

Once my DS415+ (with the C2000 fix) finally dies, I’ll most probably go with a Terramaster F4-423. They have an internal USB-port with their OS which you can replace and install a custom OS to it. And it’s basically just an Intel NUC with a storage controller in a nice package. So, pretty much compatible with the usual OSes and NAS softwares.
http://www.bofharchive.com/
https://bofh.bjash.com/
😉