The unfortunate situation is that if you are over 10 miles to your office ( which many are ) you will have a hard time making that commute in a acceptable amount of time, unless you actually make an effort at going fast.
It really depends how long that takes though on a few factors. For example, in the Netherlands you can separate two distinct groups.
One are those who cycle between cities, usually these are either old people for recreation, or much bigger, teenagers (12-18) who cycle from a small village to a nearby larger village or town to go to secondary school. Those people have two things in common, 1) they have nice bikes with gears and 2) they have very long stretches of fully separated cycling paths without any traffic or stop lights. They can pretty easily get speeds of 20 km/h and do a 10km trip in half an hour.
The other group of people are mostly inner-city people who don't take their bicycle outside of the city and use it for shopping, seeing friends, cycling to work, to a station etc. They usually have what are called 'opa' and 'oma' bikes without any gears. And their trips consist of mixed traffic (quite a lot of separate lanes, but not everywhere) with a lot of traffic stops every minute or so. They get speeds around 14 km/h or so, and with the constant stops some effectively get more like 12 km/h. Their 10km trip suddenly takes 50 minutes, and that's just not really acceptable for a lot of people, particularly when you're in your suit for a morning meeting and it either rains or gets really warm.
So it really depends. In big cities though, you'll rarely see 10km trips, 8km is the reasonable limit for most, 1-5km is typical (for example 1km for shopping, 2km for sports, 2-5km for friends or work or a station).
I ride moderately hard, so I arrive with a bit of sweat on my body and on my face. Sometimes I wipe the sweat off my face with a paper towel.
10 mins in my air-conditioned cube and I'm back to normal temp, all dried off, and merino t-shirts don't smell.
Driving a car is convenient, sure. My bike commute to work takes about twice as long as driving on 101, though my commute home is often about the same, time-wise due to traffic.
I enjoy the bike ride more, for the most part. Occasionally I wish I had a car. Once I had vertigo so I called an Uber to take me to the urgent care. If I had a car, I would have driven, but that's probably not the best shape to be in while driving a motor vehicle.
So I suppose you'll trade sitting in traffic for the convenience of having a car on the rare occasion you need one. You're welcome to the choice.
I welcome the addition of more bike infrastructure.
Also people steal stuff, so I don't like leaving things on my bike.
There are pannier backs with backpack straps, or shoulder straps, etc.
Although I have the more basic "back roller" standard detachable panniers. They take a second to attach/detach, nothing remains to be stolen. Best £50 I ever spent! They still look new after 2 years of daily use.
I am of course speaking for Seattle where it's usually cool but not cold and damp but not really raining.
Showers at the office are probably one of the most underrated perks ever.
As a sidenote, the whole point is that "the utility of a vehicle" shouldn't far exceed the utility of a bicycle/public transit in an area as developed as Silicon Valley.
If my plans change I leave my bike at work and arrive on mass transit the next day.
OR, unless you get an eBike. Which, while more expensive than a regular bike, are still vastly cheaper to purchase and operate than a car. A good pre-built eBike will probably sell in the $1000-2000 range and uses a negligible amount of electricity.
It's truly tragic that bikes as a form of transport has been regulated to the domains of college kids, hipsters, fitness buffs, and enthusiasts.
< 15 miles is manageable for most people if they don't give up the first day they're sore.
edit: I see in your other comments you mention Ontario, interesting. Seems so strange that a mode of transportation could carry such a stigma.
And if the infrastructure is good enough, a lot of people will deal with some clumsiness. Lots of people in Denmark and the Netherlands use bike trailers or cargo bikes, and having had a chance to use them, believe me, those are DEFINITELY clumsy.
Building public transit extends the longer commute. Building out local cycling options extends the area that the public transit options can serve. It also relieves congestion on those same public transit options since some of those living 5 or 10m away are more likely to bike.