NOLF is actually source-available [0][1][2], and it has been since not that long after its original release.
There's also a community-driven project [3] keeping it playable on modern hardware - however, it hasn't seen any activity in several years.
If you haven't played or heard of NOLF before, I highly encourage checking it out. It's a fantastic title, even after all these years.
0: https://web.archive.org/web/20020217233624/http://pc.ign.com...
1: https://web.archive.org/web/20010720053220/http://noonelives...
Which is reducing the complexity of control schemes to either nothing or mortal kombat like combos.
Forward, down, forward, high punch to build a new city in a 4X in a few years?
If, as you suggest, the control schemes of video games are becoming less complex (Forward, down, forward, high punch) then surely the result would be more games that are playable with only a keyboard, not fewer?