Agreed. I recently stumbled upon the fact that even Hacker News is using Firebase for exposing an API for articles. Caution should be taken when writing server-side software in general.
It's also that not all services used together may work on the latest version of k8s. For example, one of the services can only support up to 1.11 and need updates to use 1.12, then you suddenly cannot deploy 1.12 to those clusters. I think in terms of LTS it's more about having stable APIs for developing.
For direct integrations there is already a tool called Sublimerge (https://www.sublimerge.com/) (I am not affiliated with this team), anyone compared the two?
If it's a merge tool is not integrated directly with the editor, it's not as useful.
On a side note, the competition for this sector of market, for sublime and such is much tougher, like atom and vscode being "free" to use. The one thing that hinders definitely, is the amount of third-party packages available.