I've been cycling since my late teens and I'm now almost 65.
I've biked to work in Cleveland since 1976, first for 1/2 the year, then in 1982 and since for the entire year. Learned a lot about winter cycling which is applicable to backpacking.
I visit friends, shop, and do just about everything on my bikes, unless the distance is under 3 or 4 miles, in which case I'll walk, as long as time is not urgent.
My wife cycles all winter too, and rides downtown with me to work, then returns back the other way where she has her shop, close to where we live.
We cycle during the winter on weekends, where my wife and I visit friends who SAY they're willing to ride, then back out, feel guilty, take pity on us and feed us hot chocolate and cookies as we stagger from one community to the next on our way home, often well after dark. We play up the sympathy part and won't let them know we're having a fine time.
One of our friend said: 'when you go out to cycle with Marty in the summer, take your lights; when you go out with him in winter, take your sleeping bag'.
We take a 2-week cycling vacation every year, mostly to eastern Canada, where the folks are friendly and we can try out our high school French. Eastern Canada is quite a bit nicer to tour than the eastern US.
We own 16 bicycles between us, half of them for winter riding, where we might just need to grab another bike if one fails as we start off for work. That happens a lot.
Most of our bikes are horrible. You couldn't buy ones as bad as what we normally use. Many were given us for free or for less than $100. But with bicycles, almost all the quality of the ride is what you put into it. If the bike is 5# heavier, it's almost un-noticeable. That's what I like about cycling...most of what makes it go is us.