don’t even bother to say what that downside is or expand on why

You have already mentioned it, it makes it more difficult to switch away to an alternative and it locks you down to Proton’s services. One of the main reasons why it’s so difficult to switch away from Google is due to their vast “ecosystem” of software services, though of course, this is an extreme example. Proton is a much smaller company, but my point remains that it is more difficult to go from Proton to another email service (like Disroot or mailbox) than it is to do the reverse.

I can think of another too. If one account is compromised, the whole “ecosystem” with email, drive, VPN, and maybe passwords/2FA (depending on how bad it is) could also be accessed or blocked. There’s a higher chance for one company to be bought out by Big Tech, banned in your country, sanctioned by the U.S., etc., than many simultaneously.

I ultimately agreed with your points in some form, and you…challenge me anyway?

It doesn’t look like you have. You negated how Proton is licking the boots of Trump by saying “every CEO is pro-GOP”. You emphasised how they were “not bad”, all of my points were “personal decisions” of some sort.

Also NOWHERE in my post did I say their services were good

No, you said they were not bad. Distinctly different from good. You said my points does not make Proton “objectively bad”, that they were all “personal choices”. I said that a lack of a Linux client for Proton Drive is bad. The lack of proper IMAP support (that is, without the use of Proton Bridge, since it only works on desktop) in Proton Mail is bad. Tying everything to one account is bad.