The archery business is just like any other business. You don't stay alive without sales. If everyone kept on using the old stuff, they'd soon go under. So, they have to push the latest and neatest.
That's not saying that some of the new technology isn't great. I remember when the cams first came out. That was a great improvement over round wheels. Then came the parallel limbs that enabled them to make bows much shorter and more compact. Some new stuff stays around a long time and some soon disappears.
