Depends on the person and the anticipated circumstances, as with many things in life.
As a personal defensive weapon? As long as the owner/user is capable of being safe, accurate and reasonably proficient with a DA revolver ... why not?
I've always liked revolvers.
I like Single Action, traditional Double Action and Double Action Only revolvers for different reasons and perceived needs.
I'd be comfortable carrying a revolver again as an issued service weapon. Matter of fact, today I could choose one that has a 7 or 8 round capacity. It wasn't that long ago that a 7+1 capacity Colt Model O Pistol was considered perfectly acceptable by folks who carried weapons both professionally and as lawfully armed private citizens. I'd be fine with an 8-round 627 for uniform or a 686+ short-barreled 7-shot revolver for plainclothes use.
Of course, I spent my formative years in LE as a revolver carrier/user, and only grudgingly accepted TDA semiatuo pistols when the wave finally arrived at my agency.
Sure, I've got a safe full of semiauto pistols nowadays, and I've been through a bunch of armorer classes for various makes & models. They're fine for their intended purpose.
I've returned to carrying revolvers more often off-duty in recent years, though, if only because many of the small 5-shot models are much easier to carry in a variety of circumstances on my own time. I own 4 different 5-shot revolvers, with another one on the way. That will make 3 of them chambered in .38 Spl and 2 of them chambered in .357 Magnum.
I haven't taken my remaining 4" service size revolver out of the safe for other than range use in the last several years, but I can remember when I carried it, or one or another medium or large framed revolver as a frequent off-duty weapon. I just prefer a bit more comfort and convenience nowadays.
I could easily envision myself carrying a 3" medium (K or L-frame size) revolver as a standard defensive weapon for the rest of my life, if needed. I've come to prefer some of the different 5-shot short-barreled wheelguns for everyday activities, though. Pocket holsters and secure pocket carry is somewhat more comfortable and convenient for me when it comes to many of my common activities. For those times when a belt gun is going to be considered preferable, then something a bit larger is likely preferable.
Belt guns in respectable calibers for lawful backwoods activities where dangerous/predatory animals may be encountered are another subject.
I like the versatility of revolvers. I don't happen to think they're obsolete, any more than a lever action or bolt action rifle is obsolete. Depends on the circumstances in which its use is anticipated and envisoned, right?
General issue infantry/military weapons issued for military conflicts and peace keeping are one thing, but my 'non-military' needs for any anticipated personal defense needs are examined from another perspective.
Then, there's always the sheer, and safe, enjoyment of recreationally shooting revolvers of different types, as well.
There are still advantages to be considered when it comes to revolvers.
Just my thoughts.