That would be my thoughts as well, based on the last 4 years of noodling with 9mm 1911s. Mrs. gn can't really take much recoil and I have to limit the punishment as I age, so in a 1911 it is 9mm or nothing for us. I consider a full-size, all steel 9mm 1911 "operator" to be the most "fun" range gun I have ever owned.
gn
"On the internet, nobody knows if you are a dog... or even a cat."
Nothing so needs reforming as other people's habits - Mark Twain
Tact is the knack of making a point without making an enemy / Where is the wisdom we have lost in knowledge?
Is converting a 9mm 1911 to .38 Super just a matter of a barrel change (like .40 to .357 Sig) or is it more complicated?
Extractor may also need to be changed. 9x19 is rimless, but factory .38 Super is semi-rimmed (has a vestigial rim). There is also about a 10% difference in the length of the case that the extractor "grabs". If you reload, rimless .38 Super cases are available. Those usually allow the usage of the same extractor.