What features of D you would not miss?

[Adam D Ruppe]

On Thursday, 15 September 2022 at 11:15:21 UTC, Sergey wrote:
> a lot of great and high performant libs (like mir)
> working in betterC mode only..

This is impossible, by definition. Anything that compiles and 
runs with -betterC works just as well without it (this is 
actually one of the few good things about its design, it 
guarantees compatibility in this way).