The new iPad Pros come with 8GB RAM on models with 128GB, 256GB, or 512GB storage but
16GB RAM on models with 1TB or 2TB storage.
Why is this the case? Will it make a difference in how 'snappy' the iPad feels? I almost feel like I have to get at least the 1TB model so I get the 16GB of RAM. Please disabuse me of this notion if I'm wrong, and thanks in advance for the technical explanation of why this is the case.
The likelihood is that they wanted to offer a version with 16 GB for people who needed it, and they wanted to offer 1TB/2TB options for people who needed them, and instead of having potentially 10 different models (five storage capacities times two RAM capacities), they decided that they had to draw the line somewhere.
Thus they probably looked at the storage options and thought "Which of these tiers of storage would appeal to the kind of user to whom 16 GB of RAM also appeals?" and decided based on that.
Optionally/additionally, they may have looked at their whole M1 product line and tried to figure out which combination of capacities made the most sense across all products and users, so that they could create the fewest number of M1 variations and thus get the biggest economies of scale.