I have received so many significant enhancements since I got my X in Jan, 2017 that it makes me believe I will keep the car for many many years to come.
Auto windshield wipers, greatly improved self driving maps and features, auto lane changing, enhance 0-60 times from 6.1 to 4.9, faster opening/closing Falcon Wing doors, a mesh upper windshield heat/light shield, better performing sound system, auto headlight dimming, many more and closer spaced Superchargers, Summon, Dancing show, Atari games, white board on display, Jingle bell Santa, and of course...More Cowbell!
My delivery at the Factory had the bonus of a guided tour of the Assembly plant. Got to visit my first Mega Supercharger with Coffee Barista Wi-Fi and customer lounge. Got to join my local Tesla Owners Club and enjoy great conversations with other owners and gone on several group cruised and destination events.
I have made money on Tesla stock, enjoyed watching Elon launch rockets, ignite not a flame throwers, see the launch of the new Roadster and had many conversations about the Electrification of personal transportation.
For me, the experience has given me confidence that I will drive this car for a long time, and that the Mercedes will be replaced with another Tesla sooner than planned.
Seeing all the other manufacturers essentially copying what Tesla has done to bring out their own EVs has confirmed to me that Tesla has been on the right track all along.