Those all are good points. None of them are a smoking gun in itself, but taken together they form a convincing narrative. The biggest counterpoint really remains : if demand is really off the charts, why is Tesla still building inventory in such large numbers? Is demand contingent on having a vehicle that you can drive off the lot?
Let's start with the Model X, according to ev-cpo there is no inventory at all in Europe and Hong Kong. As far as U.S. inventory, teslainventory.com shows 81 P90Ds, which have been discontinued, and only 88 75D/90D, all of which have AP1, which has been replaced by Enhanced Autopilot. In Q3, insideevs reported about 5800 Model X sales in the U.S., so the amount of inventory relative to sales is a small percentage.
Perhaps we can agree that this is not really a counterpoint for Model X?
The Model S that are available in the U.S. are almost all S75/75D AP1 models. These appear to be ordinary loaners, demos, showroom models that will undoubtedly be sold out to make way for AP2 models. As noted above, IMO Tesla's unwillingness to sell these as S60s is a strong indicator of high demand.
In Europe and Hong Kong, the situation with Model S is a bit more complicated. A few S60s are now available. Most of the cars are AP1 although they have recently added AP2 models as well. Since Tesla has had European customers placing orders whose vehicles are not being delivered until Q1 2017, one explanation is that Tesla wanted to maximize the opportunity for its European customers to have the ability to upgrade to AP2/FSDC and minimize customers receiving AP1 cars too close to the time of announcement. I don't know why Tesla has the new AP2 Model S in inventory instead of delivering them to customers who are waiting for delivery, but it is only about 200 cars so may just be a quirk of timing with AP2 production needing to get rolling before European customers had a chance to custom order their vehicles. The AP2 inventory cars appear to represent only about one day of Model S production, depending on the S/X production split. I wouldn't expect Tesla to have any trouble selling them.
At the end of the day, given the strength of the other evidence outlined in my post above, IMO inventory is not a strong counterpoint on Model S demand.