Feel like I keep on repeating myself here but... here is no "they" or "/e/OS people" if you do not explicitly ask for it! Nobody has to use Murena servers for 'ecloud' or whatever services, secure or not, they are proposing.

They might use the shittiest backend and it can be absolutely unsecure... but as long as you are not using it, who cares?

There is no point in comparing the services they provide to either Google or self-hosted, just do not use them. It's really not that hard. It's in fact literally easier than making an account and use them.

So... yes you can come up with problems and limitations if you want to, but the point is, again :

• one can buy a phone from Murena running /e/OS and, in fact by default, NOT use any of their services.

The whole point is that by using /e/OS one is not using Google and has a functional phone from the start. That's it.