I absolutely love it and I have so much appreciation for the people building this stuff.
So far I am running vaultwarden and an audiobook server using plex.
That is... not inspiring confidence.
Either it's accurate so nobody uses it so I don't have confidence in it, or the number is wrong but nobody's noticed this glaring error on the home page and so I also don't have confidence in it...
Otherwise the other options people have mentioned are decent, particularly hledger.
Gnucash
Firefly III
The plain text accounting options are by far the best if you're willing to give up automatic pretty navigation and graphing.
With multiple accounts it really got tedious but I loved the actual double entry accounting and level of detail.
My wife was blown away by the year end summary I made with it. You can see early how much went to taxes, fica etc etc.
I once had ambitions to combine this with tiller or some other syncing app. I just use tiller now.
Beyond that, a few CC providers have terms that say "you aren't protected if you give out your password to services like this" so do keep that in mind (I didn't wire up some accounts explicitly for that reason, and I track them manually in the tool)
Wish the US would get it's act together and mandate a modern open banking API.