C++11 Garbage Collector - Why and Hows

Question

In C++11\'s language feature list there is:

Minimal support for garbage collection and reachability-based leak detection

(but

Answer 1

There is a proposal to remove this GC support from standard:

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p2186r0.html

and there is an C++ GC(Boehm): https://www.hboehm.info/gc/