Multiple channel layout and the schematic blocks are by themselves a huge chunk of the remaining lead the paid packages had.
The big one, not really given a lot of fanfare in the post, is ODB++ export! This is one feature that would keep people stuck on Altium. Not only does this mean you can easily use US based fabricators who require it, but you can also feed your design into simulation tools that don't easily read Gerber.
I was considering moving to it as my projects become more advanced and demanding, but after hearing that story I wont be.