Yeah, I'm pretty sure Krastorio 2 does it as well. I get the point of varying research times -- allows some researches to be more resource intensive without making them more time intensive -- but it does makes quick mental estimates harder. I've considered trying to throw together a mod that does it...

I can second Krastorio 2. It's almost like an expansion pack rather than a total overhaul.

I swear I use to have one but I can't find it anymore. I'm looking for a mod that normalizes the consumption rate of science packs between researches. For example, all 5s and 15s researches become 30s. And if it was 100 packs at 15s each, then it becomes 50 packs at 30s each. It helps me with the qu...