! For me, personally, at the risk of sounding a bit strange, I find hitch cords to be aesthetically pleasing, tactile friendly, and visually satisfying as everything is nice and round. I also like how each hitch is unique, like a snowflake, no one is alike and the sheer volume of possible orientations with which they can be tied is delightfully and overwhelmingly staggering. I also do believe that each hitch has a profile for how it responds to certain manipulations by its operator which is relatively predictable, which is why we use various different hitches for various different applications. Hitches will probably never go out of style due to their cost effectiveness and because - look at ropes and knots as a whole - ropes and knotting have been around for anywhere from 15,000-17,000 years. So they certainly aren't going to stop seeing use in my lifetime or yours, or both of ours combined. Hitches are important to society and they are important in arboriculture and I don't anticipate that changing anytime soon.
Having said that, I am the proud owner of the Rope Runner and, overall, I prefer climbing with it over using a hitch cord. However, this isn't always the case and I believe the mechanical and old school hitch combination that exists within a rope wrench setup is pretty spectacular also. So, maybe people are starting to climb with hitches less. But what about rigging? Imagine doing rigging without any hitches. How weird would that be? And keep in mind that there exists an entire world of rock climbers, rescuers and alpinists who use everything from an Autoblock, to a Klemheist, to the prusik on a Purcell loop. They are less likely to prefer heavy mechanicals over a soft, light length of Nylon and Technora.
I dunno. That's just my take on it. I'm kind of obsessed with hitch making, so I'm most definitely biased.