Even though it's been over a year since I've been WFH, I'm still processing whether I prefer it to going to an office. I miss my coworkers [some of them], but I don't miss the time suck of a getting ready in the morning and the commute (even though my office is only 6 miles away from my house). I don't have children, and my wife works out of the house, so while distractions are of course all around me, they are not as significant as they might be for others. I'm less productive per hour, but it's so much easier to be plugged in to my job longer each day, without feeling like I'm working more. The result is that I'm probably more productive per day without any real extra effort. I have the ability to shut it down for the day when I want to, so no one is hunting me down after hours.
Without going into too much detail, the company I work provides varied services to multiple clients, and I work for just one client, and I'm the only person on that job. I was "remote" from the client even when I was at the office, so the work in that regard is no different whether I'm in the office or not.
I save money on gas, and also lots of time. The getting ready/commute chunk of time is the most obvious, but the little bits of time saved throughout the week really add up: laundry, minor household stuff, etc. Instead spending hours on the weekend doing those things, I can spread it throughout the week when I feel like getting up from desk. I lease a vehicle, and finessing mileage (though never a real problem in the past) is now completely out of mind. In any event, my feelings on the matter are moot, as I'll be WFH even when the office fully reopens - the powers that be want to use the space for their multiple short term projects and make themselves more $$$ on the square footage.