Error Lens addon for VSCode
Very recently I discovered usernamehw.errorlens and it's a shame I hadn't seen it before.
Error Lens is an addon for VSCode which will show errors, notices, warnings, etc. in the editor, which are generally only accessible in the Problems area of VSCode.
Did you know where is that area? In the status bar of the main VSCode window. Did you see it? Hardly anyone sees it, and yet it should be!
We can see here I've 54 problems, ouch.