I regret not pushing a bit more for deploying a custom storage solution with TrueNAS (or something similar) instead of Synology. All the TrueNAS devices I have are mine, not from my clients.

They already had one Synology device, they don't have any IT employees on site, and I'd need to take a flight to go to their offices, so I thought that using another Synology device would be better for maintenance. They (and I) were also worried about the noise: it's an small office, and they needed at least 8*3.5" drives, and most of the decent solutions I found for 8 or more drives were big and noisy. The Jonsbo N5 appeared a bit later, that looks like a good candidate today.

Now I found that all their applications are half done, they don't upgrade or fix them regularly, security-wise is a mess, and everything on the backend is super old...