Teslas on the road today all look like they have a stale design compared to new offerings from other manufacturers. I think it’s a fair point even if they are continuously updating the internals.
And it's obviously not just internals. Compare a 2011 Tesla (e.g. https://www.motortrend.com/news/2011-tesla-model-s-revealed-...) to a 2024 Tesla (https://www.topspeed.com/2024-tesla-model-s-overview/). Again, I think it's fine to say you think the 2024 version looks stale, but the difference between the 2011 and 2024 versions in appearance alone is at least as different as some "new models" I've seen from other car manufacturers.
Do you really need to change the body design if you can keep upgrading the internals?
Personally I think it's a low-rent imitation of Mazda, so a refresh would have been nice.
For all the "but the insides have been upgraded/revamped!!" messaging, it's just confirming that they're too cheap to improve, or just change, the outside.
Also they did just update the Model 3 (looks great!) this year so they are moving in the right direction. Did you see this refreshed look on the Model 3?
But what Porsche does very well is introduce new platforms every few years. It's still a 911 but a new generation, that generates excitement and new sales. Then a few years into each cycle, it releases various sub-specialties and performance variants -- the RSes, GTs, Turbos, etc. Yes this often means at the very end of a platform's life sales drop (in anticipation of the next version) but overall its clear that Porsche has been extremely successful with this release model, which I think the other German carmakers emulate, like BMWs 3-series.