It was great news when MegaScan became free for Unreal Engine Users.
I wish substance Source also become free for Unreal Users.
Substance source also has a huge library of material that we can’t find in MegaScan. It will be great if we can use substance Source Materials along Megascan.
Oh, this tiny wish requiring nothing more than buying a Substance from Adobe 
Adobe bought just 2 years ago, I doubt they would willing to sell it now.