Personally I'm worried about battery damage to my electronic devices when they get direct sunlight. I've had a phone cook its battery in the sun (battery swelled up), and my kindle gets pretty hot as well. Is that something you're worried about?
Nah, not really. The only heat problems I've ever had are the design flaw with my current 2016 Macbook Pro that makes it heat up its batteries when charging.
I'm also probably not gonna sit out in the direct sun for hours on end, I tend to stay in one spot working 2h at the absolute most. Gotta get up and take a break to bike around the city every so often.
