No please not again. It’s all been discussed multiple times, here for the most part, but searching will get you some more locations.
Post specific questions there but please understand we dislike seeing this question every few weeks, starting another (useless, for the most part) thread or “poll” with lots of noise because everybody has his preferences and convictions.
There’s no point in repeating that as it is not really an openhab question but a general IT one, and one with as many answers as there are personal preferences out there.
Get a RPi4 with openHABian and ZRAM to mitigate SD issues.
That’s the reference and official recommendation if you do not have any personal preference. It’ll have enough power to also run Grafana.
If you don’t want to do that that for whatever reason, just build your own server like you want it to provide whatever HW capabilities, hypervisor, NAS, whatever.