Honestly, I drive enough highway miles that auto lange change is the element I want most.
This One scenario makes it worth it for me - and I replicate this scenario 6 times per year.
I drive 2.5 hours from Phoenix to Tucson at 10pm
Stay in a hotel
Speak at a leadership conference for (LITERALLY) 6 hours over the course of 1, 75 minute keynote and 3, 120 minute workshops - At the end of this I'm WIPED.
Drive 2.5 hours home from Tucson to Phoenix.
I once rented a MX with FSD "capable" and it had autopilot with auto lane change and it was a GAME changer. This is not in a cost savings, this is in time/life/energy savings. There are other scenarios that it will be beneficial, but that one is the reason I decided to buy a Tesla. I'm not that excited about autonomous driving on city streets (remember I live in Chandler AZ where I can open the Waymo One app and dial up a robotaxi right now if I wanted). But the FSD package does provide me the best and safest freeway driving experience.