Just built a NAS using TrueNAS this week. I'm using the SCALE version (running in Debian), but if you're a FreeBSD lover, there is also TrueNAS CORE.
Amazing amount of kit for such a lightweight install. ZFS, Samba, timemachine backups, virtualization and Kubernetes/Docker container apps.
Check it out, very slick so-far. Not quite as dead simple as Synology, but you can still pop the hood and see what's going on.
This is the monogram.org Mastadon server. monogram.org started in 1999 as a community of likeminded people interested in open discourse about technology, arts, culture, and a better world. The domain monogram.org is inspired by Robert Rauschenberg's Combine Monogram. We got inspired, around 1994, by Monogram through the documentary series "The Shock of the New" where Robert Hughes discusses pop art and its influences on modern culture. The community around monogram.org has continued a sort of Flex Seminar through online forums and other activities over the years.