But then Lemmygrad would have to shut down every day after working hours as in the socialist worker's paradise these things are taken very serious and no bureocrat will work even an minute longer than the official working hours. /s
Joking aside, yes... hosting on older hardware and on a regular fiber connection does mean that if hardware breaks it can take a while to replace.
We have a bit of redundancy with PSUs and so on, and this specific issue we had now could have been avoided (and will be in the future), but we do trade off some reliability for the fun of DIY self-hosting (and it is also much cheaper).