Possible steelier arguments:

- "iPhone's are generally more expensive, Android phones are generally cheaper", so having an iPhone signals financial "goodness". Same argument can be applied to lots of other products.

- "iPhones are generally better, so if you have Android you're compromising for some reason", e.g. lack of money to buy one, "weird" political/social/other beliefs, etc.

- Messaging systems are like accents; some people might prefer dating someone who speaks their language in a more similar accent, and others might prefer dating people who use the messaging system they prefer.

Also, a lot depends on your definition of "shallow".

I'd thought of the money one, hadn't thought about the possible signaling of "weird" beliefs.

The third point seems a little silly at first, but reflecting on my own musings on whether to go full Signal-only or not I guess I can imagine someone being iMessage only same as some people are Signal-only.

Thanks!

maybe women don’t want their sms/mms/phone calls being leaked unencrypted over the antiquated, legacy telephony network?

Great point. I will use this as a greater point in my Android vs Apple arguments in the future.

As an Android user, I'd counter "Signal". Which I think would bring things back to what another comment mentioned about preferences in messaging platforms.

And maybe they prefer developing in Swift and/or prefer Xcode?