[maxloh]

It is a long way to go. Check the counts of "Unexpectedly failed" and "Expectedly failed" tests in their integration testing logs [0].

Also, take a look at the "Known differences" section in their documentation [1].

[0]: https://github.com/FerretDB/dance/actions/workflows/dance.ym...

[1]: https://docs.ferretdb.io/diff/