I need a second Tesla now so I don't have much choice - I'm ordering another Model S shortly (I have two Model 3 reservations but I'm not waiting another 18 months and 45,000 miles of driving to replace my aging 14 mpg guzzler). But I finally did the math: S60 + full self driving = $76K before federal rebate. M3 with zero options plus self driving = $35K + $8K = $43K before rebate (pretend the rebate will still exist for the first M3's off the line). That makes the most bargain basement self driving S about 75% more expensive - for what, exactly? Roughly the same range. A bit more interior room. But what else? Do we think anything about a completely stripped S is higher quality or more luxurious feeling than a stripped 3 will be? This math does lead me to think that even the cheapest S's will have some kind of significant interior and functional upgrades (and perhaps range) prior to or around the same time the 3 is released - because as it stands the S looks to me like a really poor value in comparison.