My reasons for kydex vs leather.....
-Leather loses it's rigidity over time leading to difficulties reholstering.
-Leather has a slower draw due to more friction.
-Leather absorbs and holds moisture.
Ok, let's see.
1. NOT if your IWB holster has a steel reinforced mouth.
2. Get one that has a boned inner surface, super slick and if they treat it like some knife sheaths, plenty stiff.
3. Again, get one and treat it with something like snow seal or something like that.
Not trying to tear your observations apart, they are all accurate, just listing ways to make the kydex advantage not so great.