A great read+great magazine.
TL;DR: Old bikes last way longer than new bikes. From a production standpoint, steel bikes have a smaller carbon footprint than aluminum or carbon frame bikes. Conventional bikes use fewer consumables over their usable life than electric bikes. Among electric bikes, cargo bikes use the most resources to run and maintain.
From a purely anecdotal standpoint, I do have a thirty year old steel bike that I still use to cruise around, but I do have a much newer bike for exercise and long distance. I’ve had my steel bike tuned up a couple of times over the years and all the bike shop people say it’ll basically last forever since there’s no plastic on it, which is great.
But I do agree with another poster here in saying we have to get people to know that cycles even exist first. And beyond just regular people city planners and those with the means for change. I’d love to cycle and get groceries where I live, for example, but the infrastructure is poor and dangerous, so I just drive.