On Fri, 7 Aug 2020 at 19:11, Jason Cobb via Std-Discussion
<std-discussion_at_[hidden]> wrote:
> AFAIK DRs can only be applied to the most recently published standard.
> C++14 and previous are withdrawn, and 17 will be withdrawn when 20 is
> published.

When we decide that a DR applies to previous versions of the standard,
implementation vendors
know what we mean. So sure, we can fix C++14 modes of compilers.