Lol I never left. I've been hosting TS voice comms on a VPS going on 12 years. It's stupid cheap and works 98% of the time. I don't use the new client though.
I think the last time I used it was about a decade ago when a local event group I was a part of had it for their planning meetings. They went discord eventually, but I had left the event by then because there were just some funny things that I didn't like.