My short answer would be the usual 'different courses; different courses' axiom. That needs to be tempered with evolution, and for evolution to occur, time must pass.
Many of us on here are old enough to have been a part of this evolution, and where we were at the age to get in on the start (for us) of that evolution, that become our comfort zone.
From a professional standpoint, having started with a revolver, that starting point became a reliable comfort zone. I was involved in PPC competition back then, using of course the DA revolver, which further reinforced that comfort zone. DA revolvers were to remain the dominant LE sidearm, I sagely assumed.
My assumption failed to anticipate evolution. By the time we did convert from revolvers to semi-auto pistols I had become convinced they were the superior sidearm.
As far as admiring my sidearm that I carried (example; my S&W 27) that was no longer to be the case, given that ugly matte finished polymer framed semi-autos had taken over. To further the disillusionment, everything the revolver did, the semi-auto did better: They were smaller, lighter and more compact with greater capacity; they could be fired more quickly and accurately due to short, light trigger pulls releasing striker driven firing pins; they could be reloaded rapidly and properly under even the most adverse circumstances; they could remain functional in environments that would stop a revolver, they were as reliable as any firearm could be. (Note: all this assumes proper training and discipline on the part of the shooter).
One of the factors impelling LE to evolve into the use of semi-autos was the crooks. They love them too. The reality today is that LEOs using revolvers coming up against crooks using semi-auto pistols are going to be outgunned. That can't be justified.
I don't condemn younger shooters for having no respect or appreciation for revolvers, because they were too young to be there.
What one carries is always a matter of opinion, and that preference needs no defense.
As much as I still have and still love my revolvers (DA and SA), as well as my older combat and target semi-autos, my carry preference is my compact polymer-framed double stack 9mm. If I were to find something that combines the ergonomics of my current pistol while allowing even greater protection for me and mine, I would have no hesitation in changing.
That is the nature of evolution.
