I disagree, vscode UI is pretty simple and even if not you can always creat a basic theme and use it as the initial default (after all it's just css/html) to make it simpler for novice users, the code is not really under the control of Microsoft in the sense the is open source and in the worse case scenario you create a fork from the latest build, which is already pretty stable. Microsoft itself realized the reality of this rationale and that's why their latest web browser is Chromium-based despite Chromium being under the "control" of Google.