Here's my take on top-breaks:
I've owned several in .38 S&W caliber, and had some experience with the Webley top-break. MOST top break revolvers suffer from the weakness of the latch/frame lugs having excessive wear in a short time. This results in the gun "jumping open" upon firing. Usually doesn't flip out the cartridges, just comes unlatched. The exception to this was the big old Webley revolvers which were rugged as a Sherman tank. I've never seen anyone blow up a Webley, many are still in use in former colonies of England.
By their design, top-breaks required a rather short cartridge, as the long cylinder, plus the hinge required, made a rather long and ungainly revolver. Detonics did experiment with a .357 Magnum top-break late 'sixties or so, but don't think it ever reached production.
As to auto cartridges in revolvers, the best solution is to have the extra cylinder for a single action revolver. These require no half-moon or full-moon clips, and the shorter cases punch out much easier than the longer revolver cartridge cases.
Unless you have an abundance of ACP, or 9mm Parabellum, brass, the auto-pistol cartridges really offer no advantage over the revolver rounds.