I’m not an introvert, but points 2 and 3 I totally agree to. With work and family I’m constantly around people, so I really appreciate some “alone time”. Doesn’t really matter if it’s my daily commute, TR in the basement or a solo Z2 ride. I’ve solved a lot of work and family related issues while on the bike. Riding clears my mind.
Besides, being the only TR-user in my cycling group, I’m faster then everybody else and I don’t like waiting 