For 2 gig internet you will likely need something more powerful, especially if you plan on doing much with your router (like using cake qos). The other challenge is finding a network card that works with 2.5 gb Ethernet. It is relatively easy to find a network card that works at 1G or 10G, but the 2.5G Ethernet cards tend to have issues (I have not personally had issues but forums are full of people having issues with the intel nic cards, even though intel networking cards tend to be recommended generally).

What I ended up getting ( don’t have 2.5G internet speeds, just wanted to mess around with it) was a n100 mini pc from Aliexpress. Serve the home has pretty good recommendations for hardware, and I followed their advice. They also had recommendations for switches that support 2.5G.

Here are the links:

https://www.servethehome.com/the-ultimate-cheap-2-5gbe-switch-mega-round-up-buyers-guide-qnap-netgear-hasivo-mokerlink-trendnet-zyxel-tp-link/

https://www.servethehome.com/fanless-intel-n100-firewall-and-virtualization-appliance-review/

As a note, upgrading openwrt on a x86 systems such as a n100 mini pc can be annoying (but doable) especially when upgrading between major versions.

Also I highly recommend posting questions on the openwrt forums as the users there are super helpful, including to users asking questions about what hardware setups are good. It may be a good idea just to get some more perspectives/opinions. Link: https://forum.openwrt.org/

Something that hasn’t been mentioned yet is that open wrt works on cheap devices (check compatibility first) including in all in one router / ap combos. For home use, the most likely used feature will be cake qos which will make a difference even without crazy speeds. Though anything that gives security updates is an upgrade from generic consumer routers

Might not be a great place to start and not Arch Linux, but gentoo solved allowing for many possible configurations by giving each package several different installation options. This is possible because packages are compiled directly from source so the package can have several possible setting changed during compilation. The combinations of software that work are kept track of by a program (the package manager) which lets you know if any settings do not fit together.

On the other hand Linux distros like arch that use binary packages (already compiled) have to make a decision on what defaults or combinations of software to support. If installing packages seems straightforward, it’s because the package manager and the distro are designed well. Ideally, a distro has sane defaults and takes care of dependencies so you can focus on broad strokes (like choosing KDE vs Gnome).

You mentioned that this may be impossible to create for a single person and you would be correct. It took teams of people, years for the linux experience to be as it is (and constantly improving). And yes bugs do come up, which is why picking a well maintained distro is a good idea. Because people do fix bugs and hopefully the original developers of the software also improve their programs. That is one of the beautiful parts of open source software, that it brings together massive collaboration across projects. If for example, the maintainers of Debian find a bug in a package, than when they share it with the package developers and it is fixed, Arch Linux also gets the fix.

Though I have not done it myself, Linux from scratch is a way of seeing how much a distro puts into making a functioning system (as a fun side project). The Linux kernel might do a lot less than you are expecting.

When you install windows you expect a graphical interface, drivers pre installed, some basic apps like a web browser or text reader, and etc. on Linux someone had to put together those things. That’s why android and Arch Linux can both use the Linux kernel even if they look different.

There is a copy pasta about gnu/linux which makes fun of this, as well as endless debates about which user facing systems are better. It’s also why there are so many options to choose from on Linux. For example, Linux does not come with a desktop environment so you can pick which one you want (KDE and gnome as common examples).

Arch is not basically gentoo. Gentoo is about as close as you can get to vanilla Linux while still being a distro. Arch is pretty opinionated about what defaults should run, gentoo is explicitly flexible. Also the compiling on gentoo thing really needs to stop, there have been binary kernel packages for ages, even before the recent improvement to binary packages. The gentoo installation in someways is easier than the arch installation, as long as you use defaults and customize after first booting up, and if you really want to customize stuff, portage is an absolute beast.

Just have to wait until cat 9 comes out with gravitational lensing

I saw a post a while ago that made the point that wine might end up being the stable Linux abi, we might come full circle