Probably couldn’t come up with the capital to get the minimum production up and going. If you don’t own the machines, prototyping and machining time gets expensive.
If you’re thinking about an 22-250ai and the thought of wasting an already short barrel life with fire forming, maybe consider a 22creed. No AI fire forming required and similar performance.
The sleeve mod doesn’t touch the part of the barrel that determines headspace. It only adds a clamping surface to the front of the barrel extension. The barrel still seats down to and indexes off the barrel extension shoulder like it always has.