> Wait what, external software calls into notepad? External software calls into everything. Welcome to Windows development. It's extremely difficult to imple

> Wait what, external software calls into notepad? External software calls into everything. Welcome to Windows development. It's extremely difficult to implement even "obvious" changes like a dark-mode Notepad when it could potentially break customers who have been depending on specific behavior for decades. This is why they've had to write shim-specific code for certain vendors. The desire to move forward versus the awful prospect of having to keep those shims in place.