[Formulajones]

Rollers became more and more prevalent in the aftermarket late 80's early 90's and most hot rodders were simply going that direction, that's one reason. Others would complain about the noise of the original rhoads, as many do here, that's another reason.
Quite a few of the die hard Pontiac guys I was around never ran rhoads and didn't show much interest in them. These days since they use Johnson lifters to start with and also offer a super lube option makes them more attractive in my eyes. Plus new versions (technically been out for years now) can be lashed pretty tight to a point they are pretty quiet but of course that's a trade off as it diminishes what they were designed for.