I think the biggest one is that most people's social lives also dried up during the pandemic. You weren't finishing up WFH and then rushing out to get dinner and see a movie with friends. You weren't traveling or taking vacation. I've had a lot of conversations with people on my team over the last year that were some version of:
Them: "I finished this over the weekend."
Me: "That's great, but you're to be clear you're not expected to do that. You should feel free to take weekends off to recharge!"
Them: "Yeah but what else am I going to do right now?"
If there hadn't been a pandemic, they would've been doing all of these other things and then more likely to cut back on work when the end of work hours roll around.
Them: "I finished this over the weekend."
Me: "That's great, but you're to be clear you're not expected to do that. You should feel free to take weekends off to recharge!"
Them: "Yeah but what else am I going to do right now?"
If there hadn't been a pandemic, they would've been doing all of these other things and then more likely to cut back on work when the end of work hours roll around.