You are absolutely right. 95% of the time I am a solo rider. I often catch up to other riders, but I give them their space. After a friendly hello, it is easy to tell whether they want your company or not. Most riders don't mind a brief conversation but don't want a life long companion. Wind resistance increases as the square of velocity, so going faster as a solo rider is seldom useful, and just runs down your legs and battery faster. Much better to ride at a comforatable and sustainable speed. And for that, Class I is usually sufficient.