3Blue1Brown founder Grant Sanderson argues in a new video that now is one of the best times to enter mathematics. He says AI's current math ability may be overestimated while its rate of progress has never been overestimated, and that even if AI fully surpasses humans at proving theorems, math's own value and its funding sources would be barely affected; what would change is academic culture and how credit is allocated. He expects research to tilt toward theory building, with proofs demoted to "raw data" like numerical computation, while teaching remains a core source of value because the real bottleneck is whether people want to learn.