TL;DR
A post-endgame lab that is researched with promethium science, is fueled with biter eggs, can be built anywhere, has lower research speed, but higher module slots and power demands.What?
This would add a somewhat side-grade biolab, allowing you to research anywhere with some constraints.-The lab itself would only be a regular lab, losing all biolab abilities (2x science duration and crafting speeds). However, it would instead have a total of 16 module slots.
-Power requirements would be 20x that of the biolab, demanding large and efficient fusion power as the productivity modules further increase the power demands.
-A small amount of biter eggs would be needed for fuel. This is not critical to the idea, and can be dropped, but is pretty funny. It also fits how biter eggs are needed for promethium science.
The large amount of requirements means this lab would only be optimal far into endgame, after legendary quality is mass produced, to the point where the labs themselves would need to have some quality as well.
However, it could still be useable even without quality modules, if one is so inclined to research with a slight penalty.
There would technically be a point where biolabs outperform the promethium labs, but it would require an obscene amount of research productivity, and it would only be by a small amount.
Why?
This adds a few things to the game:-Adds extra incentives to make high quality modules, as this only performs well with epic/legendary support.
-Gives promethium science something to unlock other than one tech. Since science is the theme of promethium packs, it would also be fitting.
-Allows people to build science anywhere efficiently, which many people want to do.
-Fueling science with biter babies is funny, and fitting for promethium science.
Edit: Maths have suggested about ~20-24 module slots would be needed rather than 16 if 100% science pack drain is used.