>1. It’s ok to keep laptop plugged in, even at 100% battery
It might be "ok" to keep it plugged in at 100%, but if your laptop has a "battery conservation" mode that limits the charge to 80% (or similar), that's even better.
Oh wow, looks like that's brand-new (from March?) as opposed to AlDente which is about 4.5 years old at this point, at least according to GitHub releases.
It looks really really sharp, the UX is definitely much more visually appealing than AlDente. I might have to check it out.
I think (though I might be wrong) charging of Apple hardware detects usage patterns and it would already not charge the battery to 100% if you’re frequently plugged in.
But that only applies if you have a "charging routine", e.g. you always charge overnight and use it on battery all day long starting at 9:15 am:
"When the feature is enabled, your Mac will delay charging past 80% in certain situations. Your Mac learns your charging routine and aims to ensure that your Mac is fully charged when unplugged."
But in my experience, the feature doesn't do anything if your Mac is just usually plugged in. It simply stays at 100% because there's no routine for it to learn for when you tend to unplug it.
https://github.com/AppHouseKitchen/AlDente-Charge-Limiter
I keep my MBA at 60% since it basically never goes for more than a couple hours within being plugged in.