Yeah I've seen this, and have considered getting a new fork for my steamroller, but I really want back disc breaks so I dont have to run it fixed all the time. I prefer the idea of using a frame that can accomodate gears for possible 1x set up in the future.
get disc tabs and a rear derailleur hanger added at the same time? Even with paint, it will work out cheaper than buying most new frames, if you like the steamroller
@Jimmy_Fingers built a 650b steamroller with a custom disc fork. Not sure if single speed or fixed