Yes but it would need to be highly coordinated by a bunch of competing parties with opposing interests who are probably only going to agree on anything when the

Yes but it would need to be highly coordinated by a bunch of competing parties with opposing interests who are probably only going to agree on anything when the status quo hits a serious breaking point and not a second before that. Look at the ES4 disaster and original Dart situation, any hypothetical breaking evolution of JS would have to overcome similar challenges.