If you accidentally delete the Google 2FA app, or your phone is stolen / lost, you have to regenerate all the tokens, which can be quite a pain. This happened to me once, and I was lucky I had several 'recovery codes' which I then used to reset the tokens. Personally I would stay clear from a Google-issued 2FA app as they have more reason to track you and the services you use.
Also 2FA can sometimes be overkill, especially if you're constantly logging into accounts which you know will get old and dusty over time (think Yahoo Mail for example)
Go for something like FreeOTP: https://freeotp.github.io/
Also 2FA can sometimes be overkill, especially if you're constantly logging into accounts which you know will get old and dusty over time (think Yahoo Mail for example)