I have no idea what you&#x27;re trying to say.<p>PHP stalled in pre-6.0 land and then jumped straight to 7.0 because the release was just not going to happen. The closest thing in Node I can think of is ES4 (which failed, resulting in a jump to 5 and ActionScript diverging further).<p>Node stalled in pre-1.0 land with what was effectively a feature freeze before io.js split off and jumped to 1.0. Io then went on a regular release schedule strictly following semver leading to 2.0 and then 3.0. These aren&#x27;t backwards incompatible in the sense that PHP 5 is to 4 or Python 3 is to 2 -- most code will likely still work; they mostly propagated breaking changes caused by updates to the underlying V8 engine, breaking some native extensions. The &quot;jump&quot; from 0.12 to 4.0 for Node is because instead of merging io.js back into Node, Node 0.12 was merged into io.js and io.js became the new Node 4.