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Same here! I'm really sad they never added anymore chat protocols, and now most of the ones I used are obsolete or don't work. I stopped when all my friends switched from Skype (which I used Trillian for) to Telegram, but I missed how compact Trillian was.
I get the impression that Pidgin, Trillian and the other one I can't really remember just gave up at some point. I'm using Pidgin, mostly out of nostalgia, but the default configuration basically can't connect to any mainstream messenger these days (Facebook, WhatsApp, Hangouts, Skype or Viber). Plus the UI is so dated, especially regarding emojis. Before anyone asks, it's in C and I'm nowhere competent (or intereste…
I use the Hangouts and Slack apps on my Android phone to read scrollback history for the time period when Pidgin is signed off, or to monitor channels in mostly read-only mode while away from my desk.
I find responding via swype infuriating and rarely worth the effort. It leads to very low information content since people use poor grammar and vocabulary when writing on a touch screen and having every third word randomly replaced with something else by the UX.