You won’t know for all the reasons above. And you can’t expect Tesla to telegraph when they’re going to change anything, as it would freeze some customer orders. Many/most orders would dry up in advance of an upcoming change, and then surge once the change comes to pass. And Tesla would be stuck with inventory of old parts with each change if they notified buyers. Or be forced to (heavily) discount old versions. We have some idea how HW4 and additional sensors will roll out (not together), but you take your chances from there. Based on past history, HW4.5 is years away…
Now isn't that the truth? - Tesla have form for shafting people, they make sure they don't get left with cars of the wrong spec, they prefer you get them and promise you they will fix it.
All this talk about upgrades and improvements is nonsense - An upgrade or improvement is only an improvement or upgrade if it is viewed by the customer that way, for instance - The satin black - chrome delete - an improvement? not to me it isn't, Likewise, the removal of data ports, passenger lumber support, removal of white insert in door cards on white interiors, the Fiesta hard plastic lower section of the door cards, removal of radar, auto engagement of wipers and AHB when using autopilot, Pirellis instead of PS4s, Uberturbines instead of Turbines, LEDs from door card pockets, Vapourware instead of USS, The centre console change, and the crowning glory the heat pump, 5 revisions and still noisy and less reliable that the resistive heater - none of those things to me are improvements, though they are to Tesla who benefit from reduced costs to build.
I do hope Tesla bring in the Yoke and stalkless and get left with thousands of cars many will not want to buy - they deserve a rocket right up their Jacksy for their arrogance.
They have brought in features that I consider an improvement like the 3D6 motor, Ryzen, LI low voltage battery, the heated steering wheel, the 82Kwhr battery, the power boot, the matrix lights - shame their implementation for some of those is poor - one powered strut for the powered boot and dumb matrix headlamps.