Without a way to easily import data directly from my banks/credit cards, using GnuCash (or Firefly III, a great alternative that's also worth checking out) just takes way more time than its worth. (OFX was not as straightforward to obtain or use as one would hope). Mint is so much easier to use - it automatically pulls and categorizes transactions from pretty much any institution imaginable without no user effort needed. I stopped using Mint after a brief stint because of data privacy and security. No matter how many security claims they made, I just couldn't justify giving them my bank passwords in plain text. I suppose it doesn't matter as much for credit cards, but for my checking/savings accounts, a compromise would actually jeopardize my money. Apparently some of the big US banks are starting to roll out authentication APIs (e.g OAUTH) so it may be worth another look.

It does seem like there's still room for a FOSS/selfhosted Mint clone that gracefully and automatically handles data import (I wouldn't even mind having to enter my banking passwords each time I want to update, to avoid storing them)