Nobody should use Telegram, in my opinion. It’s run by a shady company that doesn’t even disclose the inner workings of their service properly, uses a non-standard encryption protocol and doesn’t even encrypt chats by default. The only thing I like about Telegram is the fact that you don’t have to expose your phone number to use it.
One thing they really have going for them is timely delivery of image data.
When I detect motion in my driveway I send them the JPEG through their API, without skipping a beat I get the image on all of my devices including my watch.
I tried email, discord, SMS, slack, pushbullet. Stuff either takes a long time to come through or comes through missing an image. I honestly hope they never shut down the service because I cannot find another service that runs as well. Fortunately for my needs I don’t care and the least about encryption.