In my opinion, a lot of the bad reputation of the 25acp comes from the cheap pistols. Seems like a lot of them are made with loose tolerances in the bore and chamber to make them cheaper to produce...that results in even lower velocities.
The better pistols have tighter bores.
I have read some handloader experiments which gave very good velocities in the 25acp. Like a +P 25. We will never see it produced due to the cheap zamak pistols.
As far as the 32acp, I grew up reading the gun mags with their continuous disparagement of the 32acp. They were always writing about how weak it was.
Well...my dad was a WWII vet, and he brought home a French Unique 32 pistol.
Filled with these stories about the "weak" 32acp, I decided to fire one round in the house when nobody was home. I was about 13.
I set up a couple thick paperback books in front of an old mattress leaning against a wall.
BANG!...
Ears ringing, I looked at the books...the FMJ had gone through both...looked at the mattress...right through...looked at the wall...yup...right through into a closet on the other side, where it was stopped by a wooden shoe tree. The FMJ bullet was laying on the floor, and looked undamaged.
I learned two things...
Don't experiment with guns in the house
The 32acp is not weak.
Fast forward to the 1980's, and there were Walther PP's made by Manurhin available cheap, in 32acp. I bought one and carried it for quite a few years till I foolishly sold it. It was very accurate, and it easily handled the Silvertip 32acp load. I wish I still had it.