It was useful and good like 10 years ago. Now they are not better than some other apps like viber, signal, telegram. I have stopped using it like 3 years ago.
I like telegram. It would be a great substitute for whatsapp in my opinion. Unfortunately only 30% of my friends are using it. I installed telegram also for my dad but he just keeps getting back to whatsapp. It is hard to convince everybody to switch.