This is old news but I do often think about the flaw in Tim Sweeney's strategy to try and bully apple and Microsoft into making their platforms work his way.
Honestly Epic should have got in the Linux bandwagon years ago so they could provide their own hardware.
Patents are abused all the time. Here's a banger from Apple https://www.theverge.com/2012/11/7/3614506/apple-patents-rectangle-with-rounded-corners