As somewhat of an outsider, the C++ spec process seems really strange to me.

It’s weird that major features are designed from start to finish without even having so much as a demo.

It feels like there should be a back and forth process between committee proposal -> experimental impl in a major compiler -> community feedback, and so on.

It sounds like it’s basically the waterfall approach to language design? They write a glorious spec and chuck it out to the world, and hope that compilers can implement it and people actually find it useful. Example: modules.