Just to clarify, I'm self-hosting. I'm using neither Proton nor Dropbox.
However, I'm a privacy pro, and I read Privacy Policies on a daily basis (ok.. weekly basis).
The US companies recently moved to disclose ALL the providers they are using (including for controller activities) where European companies still hide this information (and disclose only the providers used to deliver the service).
For a very concrete example, Salesforces is mentionned by Dropbox where Proton is silent about the crm they use.
On this specific aspect, the USA are ahead of EU.
That's all I meant.
If you want to read it as "give your data to the USA", feel free, but that's not what I said.