Though the little .25ACP is anemic it does have a following and is still produced. I own just one,a vintage Galesi thayt still needs a break-in. I really don't carry it. But do shoot it sand remedy it's fine machining. It was tooled even the sight groove! Fit and finish are old school European.
Maybe that is my attraction to the pistol
I do doubt the power of the cartridge but still it is better to have 6 bullets than a bare hand...
I much prefer the .22lr because you tend to practice more with a .22.