Next time you see someone on HN blithely post "CPU / RAM is cheaper than developer time", it's them. That is the sort of coder who are collectively wasting our CPU and RAM.
Even an editor running under Inferno plus Inferno itself would be lighter than the current editors by large. And that with the VM being weighted on. And Limbo it's a somewhat high level language...
If you ran a business, would you rather your devs work on feature X that could bring in Y revenue, or spend that same time reducing CPU/RAM/storage utilization by Z% and gives the benefit of ???