Erik, Professor Dr. SWMBO and I both feel that the supply will resolve and come in such that it will meet the demand "in the moment"...after all, the local CVS and Walgreen's (the two biggest venues for general public shots, I believe) can only do so many in a day. An article I read yesterday was expressing concern that there are many areas that are somewhat devoid of the major pharmacy choices and that brings into question how the immunizations will get mass-delivered to populations there.
Moderna's vaccine is a little easier to distribute, by the way, because it doesn't require the super low freezing temperatures (-94F) for shipping and storage that Pfizer's does. Moderna's is fine with "merely freezing" which most pharmacies can accommodate already.
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The most expensive tool is the one you buy "cheaply" and often...