I look at it as a perfect circle.
Without the kits I would not have anything to improve. It would be all or nothing on my end...all ,meaning a $1,500.00 kit that very few would purchase.
Without the improvements: a second level of reliability and power are not available.
It's no different than the vast amount of aftermarket, high performance, parts for the small block chevy.
You can build an $800.00 basic stock small block.
Or you can build a $10,000.00 high performance version.
Choices make things more fun.