My work from home setup is perhaps different from some.
I've gone with laptop only and like the freedom of moving around the house. With the kiddo in virtual schooling, being able to sit down at the dining room table on a whim is great. As are video calls from the stairs/bedroom/breakfast-nook/patio etc
My body has not reacted with the same enthusiasm.
In the before times, I drove to my office, had a "normal" external monitor/keyboard/trackpad setup. Now I type solely on my MacBook Pro keyboard. It's super convenient to have the laptop on various tabletops or just my own lap.
My arms are telling me another story.
For one other surprise 2020 has brought me is RSI. Specifically Tennis Elbow of all things. The angle of my arms as I type isn't helping. Short term I'm taking anti-inflammatory medicine, icing my elbow, and wearing one of those forearm brace thingers.
Clearly I need to re-assess my posture as I move around the house.