Sure, I guess it's more a question of degree.

I still think the original point I was replying to ("don't stand out") doesn't apply to systems with "soft" anonymity like Signal. Even more importantly, arguing that specific features like custom servers or non-Firebase notifications are problematic because they "stand out" is particularly silly -- those features are the exact kind that are already fingerprintable by virtue of Signal's inbox design. Even if the social graph is somewhat anonymised, Signal does not attempt to hide that you are using Signal. (You could argue custom servers leak some data about your social graph but I'm not sure it is much worse than the theoretical leaks we spoke about earlier. And it's kinda notable that when Moxie argued against federated servers as a concept, that wasn't among the arguments he made.)