Back in the early days Umbraco worked with MySQL. And worked remarkably well, at least for my use-case, not sure the core team agrees ;-).
I have this dream that now that Umbraco runs on EF Core it could happen again, maybe even extend the list of providers to Postgres as well.
Is there any on-going work in that field?
/ Simon
This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/112359-umbraco-12-on-ef-coremysql