What do you mean “we won’t need mathematics as it is today”?
replyTo further human understanding is itself a goal that single-handedly justifies our efforts.
Jumping straight to the “answer” and therefore missing both the understanding of the actual problem, and any useful discoveries along the way is a waste at best, and actively harmful at worst.
Physics alone is more than enough to “further human understanding”. All current mathematicians can move to other sciences, closest being fields in physics, and it will all continue to progress just fine.
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