These people would be able to converse with you on Telegram but would not be able to find your phone number on the app/site.
Wire is a platform/client that allows setting up accounts with email address and/or phone number, although when I set it up I had to provide a phone number. Contact sharing is not perfect yet. It also has end-to-end encryption by default, has multi-device and multi-platform sync, and some other cool features (doodling, for example).
That said I'd like 2 user options on my phone more to separate work/personal so I can turn off one but not the other.
Changing your phone number and getting everyone who still has the old to change over can take years.
To ensure your emails actually arrive in GMail, the only sure way is using GMail yourself.
Otherwise, you’ll never be able to be sure they arrive.
That’s like every ISP only allowing people from the same ISP to call them, and then increasing the cost to creating a new phone number.
Sure, now you prevent spam calls, but you also make phones unusable.
I suddenly got hit with a flurry of spam calls today which furthers my distaste for giving out a phone number. If only giving out free limited use phone numbers was a thing.
Phone numbers are much harder to change , so if some annoying person gets a hold of it suddenly they can harass me across networks. This is a thing that actually happens! A big reason why I don't like telegram (even if everything else is awesome).
I'm cool with my account being linked to a phone number, but I'd rather avoid giving the phone number to people I want to talk to (instead handing out a network-specific username)