If you could make one niche idea related to FoC into the mainstream, which one would it be?

Time travel debugging

No more apps

Some overlap with @Jared Windover’s proposal, but not exactly the same: malleable systems https://malleable.systems/

infra-style interactive coding: https://m.youtube.com/watch?v=L8VpCCIxuME

Dissatisfaction with the status quo, but one specifically informed by an awareness of history and the myriad possibilities just waiting to be explored.

Democratization of coding

FOC is not "No Code" or "Low Code", it is "Grow Code"

Getting away from keyboard + mouse (and even flat screen) interactions, to make digital things. Bret Victors 2011 rant on the future of interaction design is still very much relevant. I hope I don’t have to stare at a screen to be a digital maker in the future 🚀