Why does intpromote spew warnings for ~ operator?

[Alexey]

On Monday, 13 September 2021 at 21:03:41 UTC, Guillaume Piolat 
wrote:
> On Sunday, 12 September 2021 at 14:14:03 UTC, Steven 
> Schveighoffer wrote:

It's also not exactly clear why:
1. D should be backward compatible with C, which is 50 years old 
soon.
2. why exactly somebody should copy / paste (how many? 
thousands?) many lines of code without thinking and rechecking. 
Probably D can't be and shouldn't be compatible with C / C++ to 
that distinct.
3. Is really backward comparability with C/C++ so important?