> Don’t trust the server side of any service.

This comes across as dismissive of the criticisms outlined by GP in favor of more general critiques about owning your own data. Yes, "The cloud is just someone else's computer", but GP gave specific criticisms about Signal.

This would be no different from someone replying to a criticism about Telegram ("They rolled their own crypto; Don't trust the server side of Telegram!") with "Don't trust the server side of any service.". Yes, it's true, but it doesn't address the issue raised.