There aren't many battleships left, either. Or horse cavalryman. Or mailed knights.
The next war will bear no resemblance to the previous ones, though some entities continue to profit mightily from selling outdated tools to governments who believe it must be fought the same way.
It's a foolish and potentially fatal error to discard proven effective weapons systems and the means to replenish them.
While not deployed as cavalry, the boots and saddles Spec-Op warriors found that older methods sometimes served best.
I recall quite a few military pundits saying close quarter combat was a thing of the past so maybe we should abandon the bayonet. And yet....