I purchased my Model S about a year after the car entered production (I took delivery in June of 2013)... At the time, the car was brand new and Tesla had made virtually no significant changes to the car. However, shortly thereafter, updates started flying in faster than Apple refreshes their products: first with the p85+, then Auto Pilot / dual motor variant, now the P90D with ludicrous mode, etc. How long until we reach a similar scenario with the X? If it's anything like the S, roughly a year or so from now? I fully expect a P100D soonish (especially with Elon claiming crazy-high 600 mile range bumps). Would it be best to wait for new variations of the X? Any thoughts?