Yes, it is possible to have models in between, as you say, with RAM between 8 and 12 GB, just as you have 128 and 256 GB of storage.The issue here is not the storage itself but the type of memory technology used, and companies are not going to bother giving a choice of total customization of the technologies used.Otherwise, you have to turn to other brands that allow you to customize the modules you want for your phone.
And besides, your expression “the customer is king” is an old principle which is not entirely valid. We should not forget to take the variations of the complete expression.And besides, your expression the customer is king is an old principle which is not entirely valid, we should not forget to take the variations of complete expression, “The customer is always right, as long as they are not wrong.”
Most companies now are more logical about, Most companies are now more logically focused on “valuing the customer, but also respecting employees and economic viability.”