Imo, the main concern is that it's tied into your google account. That's a lot of eggs for one basket. What if some ML model has a bad day and bans your account

Imo, the main concern is that it's tied into your google account. That's a lot of eggs for one basket. What if some ML model has a bad day and bans your account? It's not terrifically likely to happen, but if it did, how much would you lose? On the other hand, I trust google's ability to store my data more than some homebrewed app. As usual, the best solution will vary, but will always include secure offsite backups.