Don't put the 38spl down.
If you do your part it will do it's part.
I have 1st hand knowledge about the statement I made above being fact and proven on several occasions using standard 158gr factory loads.
If between your ears there's a belief that you need a special type of ammo then you need to use it in order to have confidence in your selection.
I think the viability of 38spl swings both ways. Sometimes it's not enough, and other times it's completely sufficient. However, I would lean more towards it being sufficient in most SD loads.
I personally carry a 357mag, but I have a Detective Special that gets carried on occasion too. I don't feel under-gunned with any of them, but am more confident with the magnum for accuracy and operation, as the Detective is more a BUG gun. I like to be able to reach out a distance if necessary.
I am a firm supporter of the HST design, and believe only Winchester's Ranger HPs are equal. However, I don't care for their new micro load. If they would just come out with a regular 38spl+P and 357mag load I might get some, or just sell the bullets to load my own. I would still load them to 357mag though.
I personally load 140gr XTPs over 15gr of 2400 in 357mag brass. Gets me 1100fps out of my 2.5" Python. Not full power magnums, but better than 38spl+P with still manageable recoil.
Carry what you feel comfortable with, but I wouldn't ignore 38spl, even if HSTs aren't an option. Yet, I completely understand wanting something more too, as I'm the same way.