For those that run Element server and run postgresql version older than 13 will need to update their postgresql major version.
I found these instructions by ‘maxkratz’ on their github page which worked perfectly for me to go from 11 to 16.
Hopefully this helps someone!
MongoDB does have that annoying quirk where it creates several huge files even with a small amount of data in the DB itself. But at least it can be upgraded.
SQLite is really the only one I’ve used that doesn’t bother me in some way.