There's the idea of having unit-specific techs, but I think they should wait for: https://gitea.wildfiregames.com/0ad/0ad/issues/7666

Right after this, I'm imagining that Hamilcar says something like, "Use our ships to scout the coastline for a good harbor!" But your ships are attacked and sunk immediately by Iberian fire ships when your ships venture outside the landing zone, lol. 

Voice acting could be challenging.    

This would help with trailers  We only use the cinematic features for camera controlling purposes.

Regarding voicelines, they would indeed be neat, but not being able to make them shouldn't be reason not to create singleplayer content. I too would be in favor of voicelines being spoken in ancient languages, that would also save the trouble of having to translate them into different languages. The only problem is that that will just work for Latin and Greek, many of the other languages are too incomplete to write (and then speak) full sentences and texts in them.   I think there has been a misunderstanding. What I am currently working on and was talking about earlier is something like this mockup: When I wrote "dialogue" above, I was referring to speech, the possibility to make characters of a story talk. I think the game shouldn't be paused while a cutscene like this is running. What I settled with is to provide two options and leave it up to individual scenarios whether to disable hovering, selecting and giving commands or not, but always let the player move around the camera. And by the way, yes, the narrative overlay I opened the PR for already pauses the game behind it.

If you replay the match, does it crash?

It's in the houses.