Microsoft could prioritise customer security and implement this very quickly.

It would also probably reduce their network log storage requirements ($$) by quite a bit...

Imagine a world where shareholder returns were not the primary concern of the third largest company in existence.

@ISO8601 Wouldn’t DNS be better, more performant, and more compatible across applications (not just browsers) and OSes?

I suspect all their customers who care about this actually just use DNS-based blocking.