Does it really matter for the Pro line, if there will be something that gives Xeon run for its money? Say twice as fast or twice as many cores for the same pric

Does it really matter for the Pro line, if there will be something that gives Xeon run for its money? Say twice as fast or twice as many cores for the same price? Once Pro on ARM is out, and it probably will be the last in a lineup, there will be a lot of software with native ARM support. At that point (unless there is some INSANE advantage that Xeons would give), it is pretty much given that it will become ARM. Question is only in how quickly Apple can come up with something that is noticeable beating Xeons performance-wise.