I'm interested what calculations you (and others commenting in threads like this) use to price this out.
For me, the calculation would start with the price of the trim level I have to upgrade to, in order to get the ADAS features I want on my next vehicle (tesla hater here so it won't be a tesla). Then I'd divide that cost by the 96 (since I keep my cars 8 years) in order to come up with a monthly value. If the trim level is $5000 extra, that would be roughly $55 extra per month.
I'm a tesla hater, but I will say, at the $99/month (and the ability to subscribe only when you want it), tesla is now offering a better deal than legacy car companies. I'll admit, on the whole, FSDv11 on highways is likely better than most if not all current ADAS offerings, and FSDv12 blows them out of the water, That statement comes with the caveat that one must pay attention CLOSELY at all times but that is true for almost all other ADAS systems, and for the majority of use of the current sole L3 offering. With tesla, there is always room for an update to improve the ADAS further. So you are not stuck with 'older' tech 8 years down the road.*
As a tesla hater, I will say I miss the option of plain cruise control that I set and the car maintains and it is up to me as the driver to make adjustments. TACC is not that, and overrules me far too often, thus slowly me down when I shouldn't be slowed down (like on highway 60 in Northern Ontario where the speed limit is 80kph but the car won't stick to that when it sees a highway number sign.)
And, as a tesla hater, I'll say it is a crap shoot that any update won't bork the ADAS to make it unusable.
Maybe that's why you set such a low value on EAP. What you subscribe to is not necessarily what you'll always have.
* my previous car had basic cruise control. When we replaced it after 8 years, it still had basic cruise control and a NAV that was out of date (but I wasn't about to pay $400 to have it updates, I bought a garmin which also added a dash cam.) Tech was advancing and we were looking for a car that had blind spot warning/indicator/camera (I saw that on a Kia and decided I wanted that), adaptive cruise control (we had had that 7 years ago on a rental Volvo and knew we wanted it), lane keep/departure warning (we're getting old and drifting more often) and emergency braking, plus a better backup camera and possibly parallel parking capability. The tesla had most of that (blind spot came later in an update and parking sucked up until lately) so that, plus immediate availability is how we ended up in a tesla. While they worked we liked the auto wipers (those were another new feature to us) but of course they no longer work (reason 1XX I hate my tesla.)