"Indie" doesn't refer to independence from a platform, it's supposed to mean independently published (in other artistic industries, this has become slightly muddled as "indie" is more of an aesthetic these days). The fact that these games are directly supported on one platform over others is a symptom of being indie more than anything, as a large publisher would require support on multiple platforms to ensure maximum market penetration.
Also, proton is incredible these days, so windows lock in isn't as much of a thing anymore.
This is one of the few cases where I'd be happy with splitting the book into multiple films. A film for each of the 4 epics of the first age: the creation myth up through the War of Wrath, Beren and Lúthien, the Children of Húrin, and the Fall of Gondolin (with an epilogue showing the sinking of Beleriand and the founding of Númenor).
I just hope they get Galadriel right this time and show her as the timeless badass she really is, instead of the whiny child she comes off as in Rings of Power