Some of the arguments are straight up bonkers for me - for instance, "iMessage is more secure." Is it? Apple is a US-based firm and subject to the whims of US laws and governmental intrusion.
In my circle - and I have lived in both Europe and Asia - we heavily use Telegram. I find it to be far more favorable experience than iMessage. UX and interoperatibility between platforms is far more superior and it runs flawlessly - doesn't matter whether it is a flagship Apple/Samsung device or a cheap Xiaomi phone. Or PC/Mac/Linux for that matter.