Exactly this. Why in the world would they not allow that? I don’t believe it’s that hard.

I'm on the fence about this since how would proton verify that "best practices" were followed? They are a privacy focused product and a feature like that could be used to decrease their services privacy. This author would likely implement best practices and many other likely would too, but say a competitor wanted to prove that their product was more secure, a feature like that could enable a competitor to showcase a security "flaw". And since headlines are all people read these days it would be damaging.

The feature the author described would be great but ProtonMail would need to make it fool-proof and temper-proof which requires a lot of Dev time and effort. I'm still waiting on proton bridge to work with calendar and contacts. Or contacts birthdays to show up in my calendar.

Like I said, its a good feature, but its likely a large ask for a niche group of customers.

Do you make your own house keys?

No... It's generated on your end, and even if it wasn't you can replace the private key with your own.

Proton offers a service where they hide all your messages for you, but in a way they can't even see. This person is complaining that they can't hide their messages from proton in a different way that they're likely to screw up.

Yeah I have done that a few times but your assuming I am not a lazy person it is just not worth the extra steps. Not to mention privacy wise that isn't a very good idea. Especially if the email contains some confidential/sensitive information.

I was thinking it would be cool to have a native one button fix my grammar. Or maybe a spell check like interface that I can just select text and pick alternative phrases.

There would still be privacy issues that may not be acceptable for a privacy based company like Proton Mail but it could be something like this AI will never remember or save the data it is analysing.

Isn't everything entered into ChatGPT used to further train it?

The scandal didn't lie in following court orders, it lied in the marketing and the fact that the French ToS lacked any nuance to indicate that it would even be a possibility that ip would be logged.

Furthermore, even when dealt with court orders, other companies that don't tout privacy to be one of their core values, have chosen to fight such orders in court.
Proton could've at least tried to show that they were putting their money where their mouth is, by challenging the order.

The point being made is that that means you must trust them with your private key, and you can't have say two private keys - one for low security content they store, and one for more sensitive stuff where the key stays on hardware under your control.

I don’t want to upload anything. Why would they ever not allow that?

I'm sure they do, but this feels like 1% of 1% of users. To trash an email client that will be vastly superior to most for a ridiculously niche case even amongst nerds is a bit weird.

You can be if you encrypt manually. It's easy and works everywhere.