Signal > Telegram.
Now, if only Signal had better stickers...
So Signal is better than Telegram, then you explain how Signal is inferior in some aspects.
I don't quite get the point of Signal. You have the option to use E2EE in Telegram, if you want. I don't. I want seamless sync of all my messages on all my platforms and devices. With Signal, you don't even have that option. And a ton of other features. Signal is way too basic (like you mentioned). If I want to commit fraud, or do some money laundering, or sell drugs, I can still just click on that "Start secret conversation" button.
Yes, you can argue that "but Signal is open source not only on the client side, but on the server side as well". Cool, except there's absolutely zero guarantee that that's the actual source code they deploy on their servers. Also the fact that open source doesn't IMPLY security. 99.9999% of the users are incapable of doing any kind of code review anyway, let alone a security-focused one.
See the various OpenSSL vulnerabilities, that sometimes were present in the (open source) code for DECADES without anyone from the open source community noticing. So that's about it.
In any case, this is an incredibly useful update, I could finally migrate the last remaining animated stickers from other platforms. Because I can submit any sticker pack on my own in Telegram. Then share it with any of my contacts. The previous TGS format is so much obscured and restricted that it really only works if you design your stickers for that format from the ground up. I understand that in exchange TGS can be really really efficient (it really is, the sticker sets are crazy small and smooth), but I really missed some old animated stickers from Messenger. All my friends moved to Telegram already, so it was declared a loss... until now.
But now with this added support for the webm format it took just an afternoon of scripting for speeding up the mass conversions and stuff, and all the stickers I missed are up and running for me and my friends. It was totally worth it.
And oh yes, I also LOVE that now even reactions are highlighted, I can easily click on the highlight and it scrolls me to where the reaction happened, and it also animates the reaction to the recipient, not just the sender.
At this point, I'd say Telegram is complete. Incredible work. It works perfectly on Windows, macOS, Linux, Android and iOS. Now they can get back to reducing battery drain, because that can be high sometimes - although that might come down to the fact that it's the single most used app on my phone BY FAR lol.