Wireguard was too alluring to not try though, and now I really like it. I would like to move away from my homemade pull, build, and install scripts, but not for any good/justified reason. I suppose I just like the idea of someone being responsible for a software stack that I rely on.
arch is on 5.5.6 as of 3/1/2020 (https://www.archlinux.org/download/), and it seems like the ARM porters are pretty good about keeping their project in sync (two day delay): http://de3.mirror.archlinuxarm.org/os/rpi/.
My best guess is that by April or May, Arch will do the minor version bump, and then a couple days later Arch ARM will get it.
It doesn't have the same hardware/software synergy that you like, but it might be a fun weekend experiment.
I would guess that we'll get 5.6 in the coming days.
Is the main download page the rough equivalent to `master`, and your link is like the feature branch for merging the latest kernel version into the distro?
That makes perfect sense, actually: no sense crippling install the .iso with (potentially) unstable program versions, to stymie the install process.