Time to move std.experimental.checkedint to std.checkedint ?

[tsbockman]

On Tuesday, 30 March 2021 at 00:33:13 UTC, Walter Bright wrote:
> Having D generate overflow checks on all adds and multiples 
> will immediately make D uncompetitive with C, C++, Rust, Zig, 
> Nim, etc.

As someone else shared earlier in this thread, Zig already 
handles this in pretty much exactly the way I argue for:
     https://ziglang.org/documentation/master/#Integer-Overflow