If RISC-V is fast enough to power a NAS and open source SATA controllers exist, I would absolutely prefer a setup involving that.
If I'm not going to get that... I'd probably prefer a setup from Synology. They'll do a good enough job, probably better than I could, even if the price is a premium.
https://www.ixsystems.com/freenas-mini/
I have won and its pretty awesome, running for years, have replaced the disks multible times by now.
Its very upgradable as well, you can put in more ram, caches and so on.
Open Hardware is pretty much a no-go at the moment, but iXSystems does support a lot of Open Source.
I would recommend this setup above any of these Synology things, when I compare my problems with my friends who have Synology, I usually come out pretty happy with my choices.
Honestly, the older I get, the more sick of IT I become, but what can we do about this?
Im in the market for a NAS right now, so this is perfect timing. I’m more willing to trust FreeNAS than MyCloud but as soon as I write that, I remember lots of Open Source is crap too.
https://www.ixsystems.com/freenas-mini/
You get FreeNas on good hardware by people who know what they are doing. I have been running this for years and I have no complaints exept that the 8 slot variant did not exists when I bought mine.
Edit: It seems they don't sell to the UK :(
It is still way better then the competition.