there is one other common reason for manufacturers for running out of the current set of components. It is the scenario where your sales numbers are remarkably exceeding your expectations. Elektron has been on fire recently, coming up with new/upgraded models and receiving lot of attention from the new customers. It can also be that Heat, being a new concept product, has been way more popular than predicted by sales team, going trough the pre-contracted materials fast. Again, it’s just a speculation from my side but I kind of hope that this is the case. I think they deserve the success.
From the community point of view - none of this really matters as its absolutely fine to upgrade the products whenever needed, especially if the company implements the suggestions made by the real users in this forum and elsewhere.