Even MSN Messenger was pretty well-behaved in its earlier versions, and definitely far better with resource usage.
Skype resembled malware back in those times. No idea where you got the "pretty good" stuff?
you're whitewashing Skype's history. It's always been hot garbage even pre-MS
That heart has been transplanted so many times from the client formerly known as Skype for Business, formerly known as Lync, formerly known as Microsoft Office Communicator, formerly known as Live Communications Server, formerly known as Exchange Conferencing.
Except it's Skype for Business, which is actually not Skype at all.
And same lead architect, incredible that both system suck so bad while having so many users.