You mean the "stagnant" game that keeps growing and growing bringing in more and more players every year? Any other game company would literally kill to have that sort of "stagnation".1) The comment was on the 'evergreen' concept.
2) 10 years between changes and it's yet another update that's backward compatible with the aging system with limited design space? Yes, that would be stagnation.
Sure, you might want changes and a new game, but you are not the only player. Ask the millions of new 5e players if they think 5e is stagnant.