Correct. Another factor that degrades battery life, is heat. Fast charging will introduce heat into the battery pack. So it is recommended not to fast charge beyond 80 percent. Keep the charge between 20 percent and 80 percent.
Then there is heat due to the weather. An EV sitting or driving in 110 degree heat will degrade the battery pack. Let it cool down before fast charging.
Best way to prolong battery life is to trickle charge on 110v or better yet on 220v, and again limit to 80 or 90 percent unless a long trip is planned then go for 100 percent and use soon after for the long trip.
Do your homework on prolonging battery life before buying an EV.
One thing most people do that you didn't mention is schedule charging to charge the EV only right before needing it. Say you usually leave home at 7 AM, you might set it to finish the charge to 80% at 6:30 AM. The idea being that the longer time the battery holds the charge the more it degrades the battery. So holding the charge less hours every day extends the life of the battery, at least in theory.
I almost always charge mine at 5.6kW (the lowest it'll allow on the 240V circuit). That's different from other EV owners who charge theirs the fastest their Level 2 charger will allow. The idea being that faster charge = more efficient conversion from AC to DC = less power pulled from the grid. But for me, since almost all of my charging comes when I have good solar anyway (read: free power), I'd rather charge slower to extend the life of the battery (as you mentioned) and to reduce the # of times my overall house load exceeds the 18kW continuous AC power my inverters can provide. The less frequently I exceed my inverter capacity, the less power my inverters have to pull from the grid.
By charging the EV usually on the 240V outlet that's intermittently powered (when my home solar batteries are charged at least 60% -- configurable), I'm charging the EV only when I have enough free power already stored in my home batteries to power the home through the night. So if we come home in the EV with more than enough range left for the next day, we plug it into the intermittent NEMA 14-50 outlet and may or may not get charge to handle 2 or 3 days worth of driving beyond tomorrow. If we come home with a low range we'll plug it into the constantly powered NEMA 14-50 outlet (which may or may not be free power, depending on the weather and other factors) which will definitely charge the car for tomorrow. That simple charging technique makes the EV and solar system work together better than the sum of their parts. Thinking of charging the EV as the most power hungry "appliance" in my house (we charged it for about 23K miles at home of the total 26K miles we drove it the first year), by usually being able to charge it 3 or 4 days ahead of time with free power it winds up being one of the least grid-demanding appliances in the house.