Biking is clearly is an excellent and very exciting option. However, there are obvious limitations.
1. Forget it when it's rainy and windy. A bike is just an obnoxious pain in that kind of nasty weather.
2. I recently found out that if you need to commute over some longer distance (say more than 8 or 10 miles at most), the subway remains more time-efficient when you don't have to walk too much from a station to your final destination.
On a side note, they're selling more and more electric bikes over here, including strange bulky things like this:
https://www.tritoncycles.fr/
Which leaves me in a "what the heck!?", especially when these things sell for €5,000 or more.
Electric bikes tend to be pretty expensive, to the point that €2,000 feels cheap when it comes to that kind of products.
They are nonetheless more and more in trend over here.
It is yet probably better and surely cheaper for us all to only use our legs (unless we're really old), but it's up to anyone and their particular needs or taste anyway.
I won't blame on anybody riding an e-bike. It is still a smart choice over a car where I am.