I would not say they cloned the design. The first breakthrough for Roborock was the S5, which had LiDAR and a map. Both was not something iRobot had at the time. iRobot simply chose to not innovate in the areas people wanted first. People didn’t like the random cleaning that the roombas did for a long time compared to the structured of almost everybody else.
Did I read it right? This is about a parent that expires 2022? That means it is over 20 years old now.
At this point, I think it is fair not to call it stolen.
The graph does not show going lower than 25%. Going below 20 is usually where the batteries hurt the most.
Lithium batteries are most happy in the middle (as can be seen in your graph) between 20 and 85/90%.
So yes, go look for a charger when your phone asks you to.
Most of the time people that want to go vegan choose to try it that way. It makes it quite a lot easier as you don’t have to change your whole mindset from one day to the other.
You are also generalizing quite a lot. Think about that, it is not nice.
Maybe Pangolin is what you are looking for.