Maybe you should see for yourself why exactly, there is a demo and the specs:
https://hy-plugins.com/product/hy-delay4/
But you know... as I know very well you will not agree even with proves (for reasons I know...), the specs and everything makes it really difficult for any other delay to match in the market. And it doesn't need Jordan rudess or Dan Worrall approval in order to demonstrate that.
Popularity/"mainstream"/"trending" not always equals right/best.