100%. If I understand correctly. to change a single line (say some behaviour that is wrong for your workflow) of a VSCode plugin you have to fork it on Github.

In Emacs it would probably be a short snippet, tested in your scratch buffer and added to the end of your init.el:

    (add-hook 'vscode-todoist-xxx-hook ...)

This is what I miss the most about Emacs - what I don't miss is the endless configuration/tweaking...