This has been my experience too. On a project I'm working on now, I went majority integration tests. I have about 200 of them and they now take 2 minutes per run. VirtualBox and Jest doesn't help. To stay sane, I've had to run only relevant tests. They're great for a final sweep but they do slow down the feedback loop quite a lot.

For future tests and projects, unit tests do have a place and I'll make better use of them.

A good learning experience, none the less.