Parmandur
Book-Friend, he/him
Goodman Games all-tike best-selling products are 5E books, and they make those actively, so you may have a point.But DCC breaks with your philosophy, in that its a fantasy RPG that isn't 5e, and therefore, according to your theory, is bad design. The folks at Goodman Games (and everyone else who makes non-5e fantasy games) should abandon those projects and re-focus all their efforts on 5e-compatible material, right? What's the difference?
Serving genre-accurate pulp Sword & Sorcerynis a much more narrow window, but it is a distinct one, and DCC does it very well. Better than Ye Oldde Skool D&D ever seems to have done, really, while providing a very fun experience. 5E is a much more successful design overall, but for the goals Goodman set for himself DCC is quite successful, and it has been quite successful all around.