The UI has changed more times than I care to count. Skype itself changed ownership 3 times, the underlying communication tech went from P2P to supernodes to Azu

The UI has changed more times than I care to count. Skype itself changed ownership 3 times, the underlying communication tech went from P2P to supernodes to Azure integration. At some point I ran its Linux client that hasn't been updated for 5 years. The damn thing never stopped working and the chat is still there.