Ancient ruins - tech upgrade late game?

[Jacozilla]

Do ancient ruins only have chance to provide free tech upgrade in first X number of turns?

Just wondering because while I've gotten all the other types in mid game or even late game - unit promo, gold, plus population, etc- I've never gotten a tech upgrade after what seems like first couple eras.

Anyone know what cutoff, if any, exists for tech upgrades off ancient ruins?

 

[Heretiv]

I thought it was still possible, it is just unlikely you find the ruins any more.

 

[thelesserevil]

I think ancient ruins can only give you ancient era technologies. Whether you get them isn't dictated by how many turns you've played, but whether or not you still have any ancient techs left undiscovered.

 

[adam19]

I found 7 ruins around turn 200 and anyone game a new tech, the prize was gold, citizens, culture but tech.. I suspect there is a limit for it

 

[whoward69]

It's determined by the <GoodyTech> value in the definition of the tech. By default, only the Ancient Era techs have it set to true

 

[Walter R]

...so that's why I never get "You have discovered a nuclear scientist who shows your people how to build special missiles"