I think the bar is a LITTLE higher now. If I could add one skill, its being able to read math language. It's a great skill to be able to read about a new technique on arxiv or a blog and be able to understand it beyond the surface level.

In fact being mathematically literate is really the bee's knees. Its why I suggest anyone in a stem undergrad to take their math department's Real Analysis or (my favorite) Abstract Algebra. The content is rarely relevant any jobs, but then you'll be able to teach yourself almost anything in the future.

Fortunately in my experience neither of these is particularly hard.

Hahaha, I LOVE It! You have experience in data analysis yourself?