This is an aspect I’m genuinely curious about (as someone who is relatively uneducated on this subject) because my answer would be that yes, there will definitely be people who want to regress. There have always been individuals who are willing to sacrifice absolutely anything to obtain more material wealth or power. They’re a minority, but their existence has to be assumed and accounted for. For all of capitalism’s failings, one of its strengths is that it does give these people a path to follow that produces (some) benefit to society. How does a fully-implemented communist society deal with these individuals without them subverting and corrupting the system?