If you remember the early Fairphone models they were truly underspecced, so this is reasonable by comparison. And with respect to LineageOS, my experience is that only popular phones get long term support and it's a bit of a crapshoot. And this is only going to get worse as more and more manufacturers disable bootloader unlocking, or make it incredibly obnoxious to do so (see Xiaomi).
Getting a phone that isn't a Pixel and is going to have long term support (including non-Android variants) is the main motivation here as I see it. And I'd personally be willing to have slightly weaker specs for that, although the price outside of Europe will push it away from "worth it" I suspect.



















This one is nicer than uptime-kuma if you prefer declarative config.