Isn't it all like StarForce all over again? Back then there were also claims that it is full of bugs, trashes performance, kills optical drives (maybe hard drives too?)
Most of those were bogus, a few had substance to them.

Not defending them but most of the Denuvo complaints i've seen come out of Ubisoft games and don't consider the UPlay part of the deal (or the game themselves being buggy)... and it'd be anecdotes of the early 2010s regurgitated.

There have been timing-sensitive rhythm games with Denuvo on Steam that don't add input latency or severe lag.... the only real problem is the incompatibility with linux platforms as changing Proton versions could count as another activation.