This is a valid criticism. I tried to be careful with my language to not imply things were technically the first, but to describe a lineage. E.g., Sublime Text

This is a valid criticism. I tried to be careful with my language to not imply things were technically the first, but to describe a lineage. E.g., Sublime Text was clearly at least partly based on TextMate (lifting some technologies, like snippets and language grammars, verbatim), and Atom was so much based on Sublime Text that it's initial design could fairly be called a knockoff. I think that the major players that lead to VS Code are TextMate, Sublime Text, and Atom, but I'll be the first to admit there's a healthy amount of subjective judgement there. And just me drawing on things I'm familiar with (e.g., the decision to focus on BBEdit, Vim, and Emacs as the earlier examples is simply because I know those editors pretty well). One thing I don't know much about is what TextMate's influences actually are, perhaps jEdit fits into the story there? I'm not sure. In any event, I appreciate you pointing out these features in jEdit, so far that's the earliest example of a plugin system and an integrated plugin manager that I'm aware of.