I’ve used (and still use) UnRaid before but switched to Synology for my data a while back due to both the plug-and-play nature of their systems (it’s been rock solid for me) and easily accessible hard drive trays.
I’ve built 3 UnRaid servers and while I like the software, hardware was always an issue for me. I’d love a 12-bay-style Synology hardware device that I could install whatever I wanted on. I’m just not interested in having to halfway deconstruct a tower to get at 1 hard drive. Hotswap bays are all I want to deal with now.