Re: [boost] [config] What to call macros to indicate deprecated/removed components

Daniel James wrote:

No strong opinion, but do we want the default to be that they're available?

This is a good point in principle, but as things are added and then removed, the correct default for, say, <codecvt>, flips from not available (in C++03) to available (in C++11) to again not available (in C++20).