First of all - forgive my language - I couldn't resist the rhyme
I've been thinking about leaving out buildings as I upgrade my science. It occurred to me that the Xeno-Lab is not much use
Cost/turn Output Output/Credit
Basic lab: 1 6 6
Xenolab 2 8 4
Research Center 2 10 5
So why not just building many basic labs and upgrading some later, turning the rest into stock exchages or OFM, farms, ...
Or is there some hidden sense behind this?