[kingsuper20]

No doubt any replacement would have to be enough better that it's worth the cost (opportunity and otherwise) to both produce and switch to it. Perhaps security/privacy issues might drive a serious rehatching of commonly used software.

It occurred to me that there's enough inertia at this point that you'll likely only see ground-up architecture and/or implementation when some sort of hardware substrate is produced that requires it. Until then, we are on the karmic wheel of cpus that drive os/language design that drive cpu design.

[sagarm]

Google is building a new OS called Fuchsia, with no new hardware to drive it was far as I know.