Originally Posted by guadzilla

To be clear, I am not *arguing* with you. You do you, I have no issues with that. Think of this as more of a discussion than anything even remotely adverserial.

That said, re your 2 points, here are my thoughts:
1/ Sure, most people dont race. But they still like to go as fast as possible. That's why they buy carbon wheels, aero frames, etc. This is just more of the same, although with fewer tradeoffs (it isnt as if you are spending a lot more money to get some extra speed - GP5ks cost about the same as pretty much any other nice tire)
2/ I do agree that the watt savings in a lab may not translate to the same number in the real world - but it doesnt have to be lower. It could even be higher, for all we know. Regardless, in the absence of any numbers, doesnt it make sense to go with the tire that has greater odds of being faster, all else being equal?

The "all else being equal" is, admittedly, key. Handling and ride quality are great reasons to ride something else - on that front, not only do I agree with you here but also in practice: i ride Turbo Cottons and Veloflex myself, as well. There are logical reasons for not getting the GP5ks.

There is a difference between the following 2 statements:
- The extra watt savings of the GP5k are irrelevant
- The extra watt savings of the GP5k are not worth giving up on the ride feel/cornering abilities of the Veloflex Corsas

The former is illogical and cannot really be defended via arguments, other than "well, i dont care" (and I dont mean it in a judgemental way - hobbies dont have to be fully rational. I collect watches, FFS - talk about a rabbit hole devoid of reason). The latter makes a lot of sense.