Then there's music. God help you if you want to use Apple Music while driving. Just don't, you'll get someone killed. Pull over first and then you can spend the time necessary to navigate the UI. No, don't say 'use voice controls' because they really are terrible for this use case. Might as well just turn off the music.
Climate control is another fairly common one. Someone wants their seat warmer on. Find the button (at least it's always on screen in a predictable location), then navigate to the tab for the back seats, then click on the graphical picture of the car however many times it takes to get the heat level you want.
And that's just the 'while driving' list.
I've only used Apple Music briefly since it just came out, but it seems similar to Spotify.
I love that the music controls are now in a dedicated mini-panel on the bottom left of the screen within immediate reach. This is far better than having to reach over to the center of the screen to skip forwards/backward (e.g. during a podcast).
You can also swipe on that same mini-panel to quickly see tire pressure and real-time energy metrics. This is an improvement over the original "swipe cards", which were clunky and undiscoverable.
For rear heated seats, that's a bit tricky from a UI standpoint. Not many vehicles have 3 heated seats in the rear, much less with 3 heating levels.
I imagine Tesla could add physical buttons for rear passengers to adjust the heated seats, e.g. next to the existing USB-C ports. I happened to come across this aftermarket upgrade [1].
At least the front heated seats are a single tap. Or they can be set to auto-mode, which works extremely well in my experience [2].
fog lights cannot be activated from the stalk
Also you say that climate is on the steering wheel ---- Where is that? Unless you are talking about being able to invoke the speech command, which is a bit different
Other things like defroster activation is more of an issue of tablet vs physical buttons / controls
