Makes me feel old thinking back when I got my first cell phone, we had to pay like 99 Finnish pennies to send an SMS and it was limited to 160 characters. It was somehow magical when Skype came to mobiles, especially its chat part which finally made text chatting free.
Thinking back, Skype used to be a thing. Everyone I knew was on it and it was finally the first time ever when I could chat with all my foreign friends when I was on the road. They also had a Linux client which worked pretty well, until some minor software company bought Skype out and magically the Linux version was starved out.