This is why modern laptops don't stay at 100% if the detect that they're always plugged in, no?
The least losing move for the manufacturer is to always charge 100%.
On my Lenovo laptop I have a toggle I can switch any time between battery saver mode(stay at 80%) and fast charging mode (charge asap to 100%).
If when designing products you never even let users choose to learn, you guarantee you will have a stupid user base. Stop endorsing stupidity.