Only takes 2 minutes so solve that. You don't want to leave for work and then have to take the day off because you forgot to charge your car and it takes 8 hours.
And how many take 8hrs? The original leaf and thats about it. You seem to be in denial. Most have fast/rapid charging and its getting faster all the time, the new nissan charger is 10min fast charge and is said to work on any battery pack. The honda fit that doesnt have fast charge is only 3hrs to full.
So what causes the lack of capacity when fast charging is used? Is it something that can be refurbished and fixed or does part of the battery actually die?
The biggest issue is not all cells discharge/charge at the same rate, this means that individual cells can over charge and that cuases damage, heat also causes damage as well, faster you charge the hotter they get. This si why they only charge to 80% so that any indivdual cell does not overcharge. Many also have thermal managment as well.
Tesla take ot further and the car and charger talk to each other far more than other manufactures to ensure a good charge without damaging.
Which is why in MIT testing as well as nissan, tesla etc. show you can rapid charge all the time and not drastcally shorten the lifespan. People need to realise cheap gadgets do not have the same sort of protections and battery managment as applications like EVs.
Other than that its just standard damage on the lithium batteries. Lithium slowly sticks permantly to the cathode reducing charge capcity and the nano structures in the cell detriorate over time.
You can make lithium batteires last much longer than designed by keeping the temprature and max voltage down.