2.2 made habitaibiltiy a lot more important. As it affects Food, Housing and Amenity upkeep it is very relevant.
it used to be a non-issue for Hiveminds prior to 2.2. But the rework realy limited the abuse potential here.
As far as I can see it doesn't affect Housing; just food and amenity upkeep. An old pre-release teaser from Martin mentioned it affecting housing, but it looks like that got scrapped somewhere along the way.
I was more thinking of how the inherent +20% habiltability bonus from cybernetic offsets it already though. Anything of the same type as my homeworld is already 100%, and anything in the same general class is 80% before I start stacking habitability techs. By the time I can open up an Advanced terraforming option, the habitability part is only making a difference on a handful of planets anyway.
But even if I consider habitability I'm back to the same dilemna: do I go Gaia to make those handful of planets friendlier to my cyborgs, keep (or move) my organics off them and turn them into Machine worlds for my bots, or forgo a different perk to do both?
Energy is not as much of an issue to begin with for Assimilators. It is easy to overlook that while having to manage food is a bit of a hassle, it also means you need a whole lot less Energy Maintenance.
And then 2.2.5 massively buffed the energy income for machine and Robot Empires: 6 Yield from Techdrones, +2/+4 Energy or Mineral districts from Hub Building. And apparently City Districts also grant you a techdrone.
True, the energy maintenance is less; but mass resettlement costs still add up and there's always something else I could be doing with that energy instead.
The Nexus Techdrone has been around since 2.2.3. The buff to their output does make them bit more noticeable though.