All mechanical equipment subjected to heavy use & abuse will eventually demonstrate the potential for problems, some sooner rather than later, depending on the equipment user and the amount of user-level attention and reasonable maintenance.
I've carried issued revolvers and semiauto pistols over the course of my career.
I've owned and used both on my own time, and continue to do so now that I'm retired.
I've been trained as a factory armorer for a number of different makes/models of pistols, but I've only been through one S&W revolver armorer class.
I've fired, and observed the firing of, many rounds through both revolvers and pistols over the course of having worked as a LE firearms instructor for 26 years.
There are advantages and disadvantages to both. Some are more shooter-related than gun-related, some have to do with loading/unloading/reloading, some with the manipulative aspects of running a gun during a fast & frantic situation, some are user-level maintenance issues and some are ammunition-related.
One of the major advantages often expressed for the use of magazine-fed pistols is the magazine, itself. Unfortunately, the magazine is also at the very heart of normal feeding and functioning of pistols. A pistol magazine is an "assembly" of parts, and that introduces the potential for one or more of the parts/components to contribute to a "problem". A problem with any particular magazine can render the pistol inop for critical moments (the shooter's
recognition and diagnosis can be the longest several seconds experienced in the shortest time
).
It's not uncommon to see someone panic and start pressing the slide stop lever and mag catch (or decocking lever or manual safety, if so equipped) when some shooter starts going through some litany of "corrective measures" to try and get a pistol back up and running. I've even watched a few people try to grab a small folding knife or mini light off their belt when trying to get another magazine. Training issues, to be fair, but still, more controls mean more opportunities to try and "use" those controls, in the wrong order, for the wrong reasons, as thumbs and fingers start grasping "TO DO SOMETHING" to get a pistol going again.
Ammunition capacity considerations for service/duty use can be somewhat of a different thing than for personal defensive use. (Yes, I know there will likely be people who vehemently disagree, and that doesn't bother me.
)
I personally only own ONE pistol that uses "hi-cap" mags, and those are 12-rd mags. The rest of my pistols use 6, 7, 8, 9 & 10-rd mags ... and I'm very comfortable carrying retirement weapons that only have 6, 7 or 8-rd mags. As a matter of fact, my choice for a "large" LEOSA weapon on our last out-of-state road trip was a CS45, which is a subcompact .45 pistol that uses 6-rd mags. I left my 1911's (7-8rds) and my M&P 45 (10rds) at home in the safe. A "secondary" option I took along was one of my 642-1's (5-shot Airweight snub .38).
I usually only carry one of my 5-shot snubs and/or one of my LCP's (6-rd .380 mags) for our road trips, but this time I decided to bring a larger caliber (heavier bullets) along for all the time we were going to be driving. The last time it was my 4013TSW (compact 9-rd .40) that served as the larger option, but it's a bit larger than the CS45. Maybe next time I might pull my well-worn Ruger Service-Six 4" .357 for that role.
Over time, overall, I tend to suspect that a reasonably skilled revolver shooter is probably a better all around handgun shooter than someone who learned their handgun foundation skillset only using a pistol. It requires a bit more comprehensive skillset to properly and effectively use a DA revolver. I'd much rather transition a revolver shooter over to pistols, than a pistol shooter over to revolvers.