I came to similar conclusions for similar reasons. For one thing I often spend some ‘work’ time dealing with personal stuff so it’s a fair turnaround to think about work (or even work) over the weekend.

Before covid, I was reaching my office around 7am and most of my team would drift in around 10am - and I’d be leaving around 4pm... Now that I’ve been working from home I still start at 7am but it’s much easier to take a multi-hour break (usually spent on some hobbies or chores, or just chilling) and then go back to work later on for a couple more hours. So I’m getting more sleep and putting more work hours in, but getting a lot more personal projects done. And yes, it feels liberating, so I guess I’m lucky. (And very lucky to have a great manager at work!).