I ride my 3 speed the most now , so I get used to big Gaps. You just adjust your pace a little bit, to suit the gear ratio ..
You can read all the salesPromos on tiny gear changes being the Racers in the Peloton advantage ..
But remember the Racers are Hired to Ride what the sponsors want to sell to the rest of the rabble ..
& so 10 & 11 speeds is about Marketing and Selling something New , and the Upgrade-itis is like the Screen addiction needing the latest I- thingie ..
Your skeptical Friend .. happy shopping therapy, Comrade.