it’s a real shame MS see security architecture as a nuisance rather than a core responsibility of their business.

I’m pretty sure the reason behind this is that they treat backwards compatibility as a higher priority in a lot of cases. There are so many odd choices I see in my day to day that I can only explain away by backwards compatibility. It’s part of the reason you see them take forever to depreciate old and insecure protocols until they get an encouragement from a vuln hitting the news.