Sorry. Your claims are not compelling enough to convince this electrical engineer who started off studying physics and chemistry, that replacing Dexcool coolant in a non-turbo GM engine is safe or worth the cost/benefit equation. I have a great idea - you go first, and then we'll watch.
Between this site and trailvoy (where most of use used to hang out), we have over 100K members over 8 years who have not been plagued with Dexcool issues, or else it would be discussed a lot more. Just statistical evidence of a non-issue, which I agree isn't 100% compelling either, but compared to choosing the wrong spark plug, which CAN give you issues, coolant hasn't been high on our list of worries. And I'm personally conservative enough about much) engine and drivetrain to not change a fluid brand without good reason. YMMV.
So when are you going to add a turbo and tune your TB? Your experience could be a huge asset to that set of members!
For something I only do every 50K miles, $5 is not expensive enough for me to look elsewhere. YMMV.