I only use public chargers if its free or cost no more that a gallon of gas. In hybrid mode I get approximately 32 mpg and some places charges 99c per hour so that is still relatively cheaper than gas if I can get a full charge in two hours. However, I have yet to find a public charger that can fully charge the van in that two hour time frame which means gas normally comes out cheaper.
"For discharge, when driving, I can I stop using the battery? I can’t right? It discharges to 0 every time I use car most days as I drive over 30 miles daily. "
Yes, the battery depletes first and then the ICE engine kicks on. Even then though, with regenerative breaking, you get back some electric, not much but some. Personally, I almost always drive with the gear in low to maximize regenerative breaking, I seldom use the break. Doing that though can create problems for drivers to your rear that get too close, because low gear slows you down fast once you take your foot off the gas, and there is no warning break light for the car at your rear.
As for battery degradation, history will tell. The more you charge and discharge (Charge Cycles) the battery, the quicker the battery will degrade. I personally don't mind charging mine up all the time, however, I do understand that my battery will likely degrade sooner rather than later. With the built in buffers that stops the battery from being discharged completely and does not charge it to true 100%, I think I'll be mostly okay, I hope.
Thankfully its a hybrid, so no big deal either way.
2018 Pacific Hybrid