Must tail call attribute in D?

[Dmitry Olshansky]

https://blog.reverberate.org/2021/04/21/musttail-efficient-interpreters.html

This returns me back to threaded code VM for std.regex, AFAICT it 
was blocked because I only could get tail calls in optimized 
build. Otherwise it was going to blow up the stack, particularly 
if it was small fiber stack.

What do you think is it feasible to enable in D?

——
Dmitry Olshansky
CEO @ [Glow Labs](https://glow-labs.pro)
https://olshansky.me/about/