What Iike in v9.0, is that the autopilot is much better. when in traffic, it just doesn't break suddently. it does the stop much smoother. an big + for me.
Overall, it easy to get use to the new UI.
I recommand you to update it to v9.0 especially if you use autopilot a lot.
I updated, and I have AP1. I have had it a week or 10 days so far. My reactions are that:
*First, it is useful to consider the two screens separately, the instrument cluster and the center screen. the considerations are quite different.
*For AP2/2.5 cars, the instrument cluster display clearly has advantages, now showing more information and enabling the use of added features such as navigating with lane changes. the photos I have seen are the very first time I have been a bit envious of cars with AP2 or later hardware. Until now, the autopilot functionality of AP1 has been about the same as in later cars, but no more.
*For AP1 cars, there seems to be little if any functional difference in how autopilot works, but the instrument cluster display has been modified somewhat, in small ways. There is no particular benefit that I can see to the UI change itself, with respect to Autopilot, for AP1 cars, but the changes are small so I do not mind. There may be operational code changes that are advantageous.
*The center screen is an entirely different matter. The center screen displays seem more crowded, with smaller fonts and icons, and more use of shades of gray. I find myself having more trouble clicking on icons -- it takes more precise finger-pointing and takes more time, hence it is more distracting, at least for now. A good example is the permanent bottom row of the screen. The rear window defroster button is further to the right now, harder to see and not as easily distinguished from the windshield defroster button next to it, and a bit harder to click. A small thing, perhaps, but I wonder if Tesla did a human factors review of the screen changes. I find the audio screens particularly confusing to navigate. I have seen many posts from people who find some portion or other of the layout changes to be confusing or disadvantageous in some way. Some of the changes seem to be change for change's sake, not for any apparent benefit.
*As to the point of being opposed to change in general, I think there is substantial merit to caution when considering the need to change how people interact with their cars -- The mere fact that the UI is rearranged presents a learning curve. It takes a while to find everything again, and to develop new muscle memory of where to click and where to look. To me, there is no compelling advantage to the rearrangement itself, so it presents a risk of confusion, mistakes, and delays. Why did Tesla do it? How does it help? There are about a quarter million cars, with probably close to half a million drivers, around the world who are familiar with the UI as it was. Compelling all those drivers to re-learn the UI had better have a substantial payoff. It is not apparent that it has.
I am not saying the new center screen is "bad," but I don't see it as better. I am sure I will learn the new interface, as I did when we went from version 7 to version 8. But to me, a large part of this smacks of the type of mentality that people criticize Microsoft for -- their periodic restructuring of the big Office applications like Word and Excel drive people crazy, because everyone has to re-learn how the commands are grouped, where they are located in the menus, and so on, often with little apparent benefit except that they conform to some new "fashion" in software design. The difference is that someone learning a new version of Word is sitting at a desk and can spend a few extra seconds finding the menu item, with no risk. They are not sitting in a 4700 pound car traveling down the road at highway speeds and trying to find the button to turn on the steering wheel heater in its new location. Tesla should be very cautious about changing the user environment now that there is a substantial number of cars and users, who all will have to re-learn where to find their information and how to take certain actions. Changes should have enough merit to warrant that learning effort and the risks of errors during the learning period.