I’m not going to say that Bill Wilson never said that. However, here is a recent video of Larry Vickers quoting Bill Wilson as referring to the 10mm as one of 3 calibers that are “rock solid” in the 1911 platform at the 1:20 min mark:
https://youtu.be/wTJlyGxcoJo
The other 2 rock solid calibers are 9mm and 45ACP. Lots of 38Super loving boomers are going to need some Anusol ointment for the butthurt caused by that claim…