The Microsoft Windows update 1803 has introduced case-sensitivity as a configurable option for Windows 10 (according to this source and others).

I wonder:
  1. has Stata itself been tested to be compatible with this mode;
  2. how to determine whether this mode is activated (from user's code, e.g. from an *.ado file)?
  3. what are the recommendations (if any) for writing user's code when c(os) is no longer an indication whether the code should be case-sensitive or not?
  4. which user-written modules (if any) are incompatible with this mode?
PS: current behavior on Windows 10 (with this update, but with this mode turned off) is that Stata itself behaves case-insensitively:

Array

Thank you, Sergiy Radyakin

Stata/MP 16.1 for Windows (64-bit x86-64) Revision 21 Jan 2021 / Windows 10