I have seen it, but I didn't remembered. Thank you for that.
Tech upgrades at each planetary capture is an interesting thing. I bet it will be tweaked in the end, but something along the line sounds fine. But I think it's a bit simplistic. Not that it's bad for a few things to be simplistic, and I think this one is elegantly simplistic. Maybe a bit artificial, but at least easy to grasp. I believe the mechanism for AI-ship-unlocks, however, calls for something more complex; a mechanism with which the players could interact in a more advanced way. The "hit four co-processors at once" and "hunt down data centers" was really fun to do, but it was just tied to diminishing the AIP.
We have a "trigger" mechanism that is fun to do (hunting Co-Pro and DCenters) but with the result only affecting AIP.
We have a "result" mechanism that is interesting (AI unlocking new unit types) but triggered only by AIP.
I saw an interesting opportunity for removing the AIP in the middle and matching them directly.
However, in my reworked suggestion, I took care to no use the names "Data Center" and "Co Processor", because I think reducing AIP an interesting "result" mechanism, and without grander idea than "hunt down things" to match that, I suppose we could have DCenters, CoProc, QComputers, Data Backup Servers and Design Backup Servers all at once in a game.
In order to answer your remark more accurately, I think that AI-upgrade-unlocks and AI-design-unlocks are two interesting and different "result" mechanisms. They sure sound similar. Do they require a common "trigger" mechanism? No. Would they benefit from it? Probably. There is also the Advanced Research Stations that is lying around in the design space (because Human players too need to unlock new ship designs). And maybe AI-upgrade-unlocks and Human-upgrade-unlock could share a similar mechanism (Humans wouldn't spend Knowledge in unlocks, but like the AI, they would... something something...)
For now, I think these two mechanisms (AI-upgrade-unlocks and AI-design-unlocks) are fine: simple "1 for each captured planet" and complex "computing power & data storage". But I'll try to expand that idea if it's popular enough.