Pure speculation on my part:
I have speculated (and posted) that the demand for a RWD (even LR) non-performance Model 3's has softened considerably.
I also suspect that Tesla has an inventory of such vehicles stored on lots around Fremont.
I have speculated that the AWD, performance Tesla has "sucked the wind" out of the the RWD, and that is why reservation holders that have not committed have received invites to purchase RWD, non-performance LR vehicles now for immediate delivery.
Finally, I suspect there are a large number of potential buyers that are waiting for the SR battery ...... cost being a major factor. They do not need AWD ..... and are not interested in performance. I find myself in that group.
If any of the above is true ....... then Tesla could solve the problem by reducing the price on the LR battery, and lowering the cost closer to the $35k vehicle that got so many of us interested in a Tesla in the first place.