I own a 2015 Tesla P85DL (ludicrous upgrade) with 65000 miles. I supercharge less than 10 times a year and have trip charged even less. In 2018 I took one of my first road trips and had supercharging speeds dropping into the 30's kwh range very quickly (only supercharging to about 70%). I complained and was told nothing was wrong. In 2019, another trip and was equally slow with loud fan noises - they replaced the fan and said to let them know if it still seems slow. I finally took a trip 2 weeks ago (about 600 miles), stopped at 5 superchargers and almost every time I was the only one there (no shared chargers; and one was a V3; one time I was shared got basically the same charging rate). At every stop, the car took twice at least as long as predicted before I could continue (if it said 25 minutes; I was usually there an hour). Effectively I expect to charge 1 hour for every 2 hours of highway driving (charging from around 20-40 miles remaining to 170-180 before I continue). The car when I leave is charging at most 37kwh (and it drops very quickly to this level). According to service, this is average in my "old" car and is to be expected for its age and the battery is "healthy" (although they won't share any reports or diagnostics). Furthermore, they stated Tesla offers no guarantee on battery retention on a Model S or X. They said the model 3 "might" be better over time since it uses new types of batteries. Since I first reported this back in 2018, that means the lifespan of having a good supercharging experience for my car was at most 3 years. So.. since this is supposed to be average for my car; I am curious how other Model S's have aged and how many other P85D models are experiencing supercharging rates that easily take an hour to charge 130 miles? Am I being unreasonable? I was considering driving the car on a 3K mile road-trip but adding 50% more time to the trip for charging is not very "super". I love driving the Tesla and was considering going all electric but there is no way I am giving up my other gas car if Tesla's charging performance can degrade this much with no assurances.