I've had an interesting relationship with this. My first job was somewhat analog, well, less highly connected than it should've been (I still worked a bunch). The next two were far more interconnected, which was the nature of the job. It was never going to fully jive with just being "off."
That led to some work-life balance issues, which was bad, but allowed for a measure of flexibility I kind of enjoyed. Also some not healthy habits. I actually took to it well, even if I wanted some normalcy sometimes.
I recently switched jobs to something that is, in theory, 9-6, but my boss seems very OK with using that "till 6" part of it. I don't like that at all, but I think it's too early to shut the laptop at 5:15. I don't mind doing a little to get ahead later in the evening, but video calls after 5? Or up till 5 with some needed follow up? I DISAPPROVE. I also need to get a handle on the long lunches part. I'm not comfortable enough yet to put that into practice.