This chart[1] from anandtech.com plots the impressive performance trajectory of Apple silicon over several years.
Of course, no technology is guaranteed to continue improving forever. The sustained performance gains reflect Apple's tremendous dedication and investment in the endeavor.
After the A11 chip, though, it became clear there was a non-zero probability that Apple could one day meet or surpass Intel.
Which begs the question: what underestimated technologies exist today that could overtake incumbent technologies within 5 years? Put another way: what technologies are in the A11 stage and not yet widely recognized for its potential?
[1] https://images.anandtech.com/doci/16226/perf-trajectory.png