Seeing this mod release prompted me to get around to releasing 2.0 of my Revert Mining Productivity Cost.

That mod is much smaller scale but similar in spirit, in that immediately upon Space Age's release I saw the changes to Mining Productivity and said, "whoah, that's cheap!", especially in light of how early its available and all other other available bonuses, and made a mod to revert it. Shortly after I made 2.0 that puts tiers at Space, the 3 inner planets, Aquilo, and finally the infinite tech at Prometheum, and had been playing it privately but didn't get around to publishing it until now.

So it seems we have similar concerns.

The idea of requiring more packs is actually really good.
If I steal this idea for my mod I would probably only add golden science and space science.

The logic of counting this as a "reversion" is that, as in the base game, it moves infinite mining productivity to the post-game.

The idea of requiring more packs is actually really good.
If I steal this idea for my mod I would probably only add golden science and space science.

I understand that this is not the task of this mod, but you can make it even more interesting.
Break infinite technologies into more steps and add a science pack to each step. The "Mining productivity" technology in K2 works in a similar way.

Let's say you can make the first three levels like in vanilla, levels 3-5 with the addition of yellow science, 6-8 with the addition of space science, and so on. And from level 16, these technologies will require all 12 types of science packs. This way, the latest pack will have an additional meaning, and interplanetary logistics will be more active.

You just summarized AssaultRavens mod ;)