Well, that sort of
is the answer to every question.
That is every question that isn't specific. You asked to rank the groupsets - and we did! They're ranked in this thread. Folks have also mentioned the differences between the levels. What we avoided doing is getting into the Shimano vs. Campagnolo vs. SRAM argument (thankfully). There certainly are still differences - both within a brand and between brands...
But, if you asked a more specific question, then people would give a specific answer - such as:
"I live in an area where shops mostly carry Campagnolo and I only have $x to spend, I ride in the mountains a lot, I tend to be rough with my equipment, what should I consider?"
or
"Can anyone recommend a drivetrain that I can mess around with but can still add 3rd party components to over time?"
or
"What's the difference between DuraAce 9000 and 7900? Will Ultegra be worth the difference? Budget is not an issue. Can I use a Sora FD and still be compatible?"
etc:.
As for your pedal/wheel examples, those are usually specific questions - knee issues, float, wheel availability, pricing, rider weight, riding type, etc:.
If someone asked for a 'general ranking' of all wheels... then... we'd end up with a few general lists within manufacturer's ranges, just as we did here.
