Another vote for Synology here. I previously had a DS418play for almost 8 years. Just picked up a DS423+ recently to upgrade and the process was literally as simple as removing the drives from the old NAS, chucking them in the new NAS, and booting up. All my Docker containers, all my credentials, all my licenses were all just there and working, despite being in a new shell.

Also want to call out the importance of 4-bay vs. 2-bay. With 2-bay you get 1-drive fault tolerance in RAID mode, which is nice. With 4-bay, you can still opt for 1-drive fault tolerance and with SHR you can have 4 drives active (of varying sizes) giving you much more available space and making the upgrade path of storage significantly easier.