Of course I'd love to see them back. I agree with them that F1 needs to rid itself of some of the engine regs.
Make it simple: you've got 100 litres* of gas to race with, build any sort of engine/energy recovery system you want. It will advance engine technology a million times faster than the current 'build to a ridiculously specific and ultimately useless' rules.
*or whatever number.
Then costs will spiral up and those that cannot afford it will be gone so grids will be smaller I like the idea but it'll never happen.
Maybe... but I know that a lot of manufacturers wanted the turbos because that makes the development 'road car relevant', which is also why there was a call for 4 cylinder engines instead of the compromise V6. I think the current formula is keeping suppliers out because the money invested in F1 R&D is a pit that doesn't lead anywhere.
Alternatively, if the suppliers can genuinely experiment with something that can trickle down to road relevance they might want to take a look.
There would still be the limit of engines per car per year. Maybe a supplier would only be allowed 4 designs per season, so yes there would be R&D costs, but it still wouldn't be the weekend to weekend arms race of the past. (Which I still miss)