Just using signal or its fork molly will do thos easily and it's already an existing peoduct

SMS is inherently insecure, you'd have to wrap it in some secure protocol and many people have moved on to data encrypted messaging instead

This whole topic borders on things like DID's (decentralized identifiers) and SSI (Self-sovereign identity) if you want to go to decent privacy lengths

A number of Blockchains have already started work on this, Cardano being one that I believe has made some good progress

The whole idea of a phone number identifying people has more than passed it's use by date, same with emails in my opinion, but implementing something that is universal that protects identity fully is extremely difficult

Instead of google voice id say more like the cloaked app. One number per contact

I agree that adding new communication features is interesting, but stability and everyday usability should stay the priority. I often test different platforms using simple activities like a general knowledge quiz (https://generalknowledgequiz.co.uk/) to see how smoothly things actually work across devices. Small practical use cases usually reveal the real user experience.

This request has a more popular thread here, https://protonmail.uservoice.com/forums/945460-general-ideas/suggestions/43892508-phone-number-alias-masking

Go there to vote as well if this feature matters (or doesn't)

I only use GV with friends/family/specialists - but I use it daily, both as a messenger service (friends/family refuse to use Signal) and to make calls using my laptop. I've had it literally since it was released (and in 2003 was a gmail beta tester, as well). Since migrating to PM in 2015, I've wanted to completely stop using google products.

That said, I would really like to see some existing products improved: drive, calendar, etc. I'm sure you hear this constantly.

There are a LOT of things to finish in the actual tools.
Focus on that instead of new shiny stuff!

This could be included in a proton messenger

Please focus on the existing services.