I’m not disagreeing with you here, but wouldn’t it be fair to say there is a gradient, but it is dynamic and defined by the current environment and what it takes to survive it?

Maybe the goal posta keep moving but we are talking about a very large time scale, so long that, for at least a couple of million years, what could be defined as more or less evolved might seem or be descibed as pretty solid.

Although i suppose its not fair to say more or less evolved and might be more accurate to say more or less well adapted.