Scotty my wife has a 2015 Altima with the 2.5 and 77,000 Km on the odometer. We put on about 8,000 Km and every year. Every spring and fall it goes in for an oil change, tire swap and other required maintenance like transmission fluid change. How long can it last because she really likes the car?
Those cars are not particularly known for longevity. In particular the Jatco CVTs used by Nissan are prone to failure. However if the car is well maintained of and not abused (no towing or jack-rabbit starts, etc.) it may last a while, especially since it appears you're not piling on the miles very quickly.
https://www.carcomplaints.com/Nissan/Altima/2015/
How many times have you changed your transmission fluid? At what mileage and/or time span?
They recommended a transmission fluid change around 60,000 Km (40,000 miles). Knowing what a replacement tranny costs $300ish seemed like cheap insurance. Especially since we only put on 8,000 Km (5000 miles) a year on average. We live close enough to her work that she can drive home at lunch. She loves the comfort.
have you tried searching his youtube channel?
Almost exactly the same car. One year off:
https://www.youtube.com/watch?v=H-Z0LcxDsHI
Guess at 5000 miles a year especially if we change the oil twice a year it should last a long time. Our maintenance schedule on our cars is every spring and fall we change the oil, swap tires and any other maintenance. We did that with a "disposable" 2000 neon that we traded in because the doors were rusting at 18 years. Ran perfectly on the way to the dealer and we have even seen our old neon in town. The new owner put on doors that don't match colour wise but they are much less rusty.