I think you're right that things have gotten much better. I'm in academic math, and I hear horror stories from 40 years ago. Women tell me that sexism is still a problem, but a substantially less severe one. And also, as you mention with regards to GrantTree, I know of several efforts in math to deliberately reach out to women, which seem to be paying dividends.
40 years from today, I hope all of us will agree that these discussions are no longer necessary.