[fname]

From the comments in the article

Microsoft informed us that a fix was planned for the January patches but has to be pulled due to compatibility issues. Therefore the fix is now expected in the February patches.

So, they met the deadline and fixed the vulnerability, but due to compatibility issues had to pull it before being released through Windows Update.

[modeless]

... so they didn't meet the deadline. The deadline is for a released fix, not a theoretical fix that nobody can install in reality. They could, and should, speed up their process. But they won't, unless they get pressure from outside.

[wideroots]

...yea it's easy to say when most people here should know how hard it is to ship any complicated system on multiple platforms. Actually, just making an app work for all major versions of Android could be a nightmare. And...what do you mean "they won't speed up their process"? Microsoft has released zero-day security bug fixes less than 90 days so many times before.

[modeless]

I didn't say it was easy. I said Microsoft could do it, and that's true. Microsoft can do hard things, if it's a priority for them. Apparently they've judged that the damage isn't worth prioritizing these fixes higher.

[Dylan16807]

'making a program work' can easily be half your development time, or even more if you don't put on a lot of polish.

But this is bugfixing, not creating new programs. It shouldn't take this long.