Owned a non-turbo 2021 mazda6 before trading it in for a 2021 with a turbo. I liked my original mazda6 just fine, but when I test drove the turbo, I realized how much it transforms the car. Mazda makes very premium looking and feeling cars and the turbo completely enhances the entire experience. Sure, the NA 2.5L is a great and reliable engine that is more than “enough”. I had very little complaints with it, but the extra potency that the turbo brings really makes these cars shine.
The KBB for my old 2021 Touring, 30k miles (sold the car a while ago but I still get the emails) is at 19k so you can for sure go lower.