The Spector setup was likely out of date by now. The tutorial may still be around on his website. The main point is that NVK told them there was an issue in 2021, Matt clearly knew about it and also could define what would protect you from it. It all came from 4.0.0 4.0.1 which was the major license change and software change.

Yeah, I remember when Specter was the overly complicated wallet that certain people were suggesting to non-technical folks to use. Nowadays, it's Sparrow, which I absolutely love, but I think we should be more careful who we suggest use things like wallets where you can set derivation paths, etc.