I see Microsoft Dynamics 365 and would like to introduce you its little brother: Microsoft Dynamics NAV. The language is C/AL, offshoot of Pascal, code editor does not support multi-line selection (let alone any features like highlighting or navigation), and source code control is managed by locking files.
I have seen those on blog and news sites, a thin horizontal bar (sometimes under the floating title) that fills as you scroll to the bottom. I don’t get it either.