Not really. The era of "modern efficient CPUs" started some 10-15 years ago. Under light loads, Ivy Bridge or Haswell is going to have a similar thermal profile to modern machines.

Many of the new machines are actually worse, e.g. 3770K @77W vs. 14900K @125W/253W. That isn't to say they're not also faster, but if you actually use it you're burning more watts.