So the best thing I'd see them excelling at in this century, if they can drive their ideology in the right direction, would be producing low-tech solutions solving 90% of problems with 20% of the costs, with open-source like tools / materials / methods everyone can replicate easily. A bit like this article about this old car.
While we're barreling toward climate catastrophe? That's not the criticism you think it is.
Do you have anything to read up on that? This got me a little excited, but I also doubt it due to the rise of right wing populism everywhere else. Man, if France actually got the rare attitude to get shit done in these times, I may move there and help.
If you like those kind of ideas you should def move in France and start building with others there little communist enclaves. Just be ready that in France we do think a lot before deciding to act, we don't have the same "get shit done" attitude like in the anglosphere world