Congratulations on your new car! I have a 2023 SV+ (purchased new in Nov) and a 2019 SL+ (purchased gently used in March). My son as a 2020 SL+, purchased in May (technically used but it had only 28 miles so like brand new).
All of us just plug in and charge and really don't think about the 80%/100% thing too much. My son has a 120 mi/RT commute, so he charges everyday. My husband drives around 40-50 mi/day and he charges maybe 3x/week. I am the one who doesn't drive much so I charge about once per week.
You can read nine zillion posts and articles on pros/cons of charging to 100% and frankly, make yourself a little crazy with all the contradictory information. I think you need to read a few dozen posts/articles and come to your own conclusions. That's what we did. Some of the key points that I considered:
- The car is meant to be used. Figure out what you need to do for daily driving and charge accordingly.
- Newer Leaf batteries are (more rugged, more robust, better designed--choose your adjective) than older ones, so lots of the charging "wisdom" you read may be out of date.
- There is a timer you can set in the car. Most people use it to start charging at a certain time, usually when electric rates are lower (ie, charge between 11 pm and 5 am). However, you can do the math and have it stop charging at ~80%, if that is what you decide is important. It's not automatic, you have to do some figuring, but you can make it work.
One thing I have seen pretty consistently: it's not good to charge to 100% and then let the car sit "for an extended period of time." What's an extended period of time? Who knows. Some say a few hours. Others say a few days, or even weeks. My car is at 42% right now and I know I am not driving tomorrow and probably not Monday (holiday) so I am not charging tonight. Depending on where I need to go to next week, I will charge accordingly.
The other thing I have seen written quite a bit is to consider where you live. If you are somewhere hot, you want to be more mindful of "hot" batteries. But I have seen plenty of comments from people who live in Arizona who charge to 100% regularly and they don't seem to be worried.
Quick charging (CHAdeMO) seems to be more of an issue for battery degradation, long-term, than charging to 100%.
Everything in this post is my opinion based on reading about Leafs non-stop since last February. YMMV. Meanwhile, enjoy the car!