I did some testing with it, because I believe more people should be able to self-host.
I like how it is implemented. It has good support for email. Many apps support SSO.
The critical part to me is how up-to-date applications are. I started a small project to automate version tracking, check out:
https://alexpdp7.github.io/selfhostwatch/app/nextcloud.html
; so for example, the YunoHost Nextcloud app does not lag much behind upstream. My intention with this is to let people see that they have been updating Nextcloud dilligently for two years; they might pull the plug tomorrow, but it's a good track record.
(I'd like to add scrapers to other projects similar to YunoHost. My ultimate goal would be to be able to choose a list of apps you'd like to self-host, and see which projects like YunoHost carry the applications you want, and compare how they track updates.)
YunoHost is very nice to run on a VPS (or a box at home, or anything). It has good email hosting support, and I feel people without systems administration experience could get it running and host a couple of apps for a group without too much trouble.
TrueNAS Scale has awesome NAS capabilities. ZFS is the bomb. Plus, they are integrating Incus, which I'm a huge fan of. I think it hits a sweet spot for people with systems administration experience. Just install it and you get great NAS capabilities, the option of running a K8S instance, LXC/VM capabilities, and some "app catalog" (I test drove that briefly and it looked decent, but I think less hands-free than Yunohost.). My pet peeve (and I understand why they do this) is that you need separate drives for the OS and for data, so if you want redundancy you need 4 drives- which is likely fine for home use, but I'd like to run TrueNAS Scale on a Hetzner dedicated server, and that increases costs a lot.
If your primary desire is to run a few apps and you want to minimize your learning/effort, I'd check out YunoHost. If you want to do more, but also invest more time, TrueNAS Scale is awesome.