For completeness, here’s the earlier discussion, regarding SIMple: Announcing Librem SIMple: An Affordable Cellular Plan that Protects Your Privacy I dare say that some of the commentary is also relevant here.
For the hypothetical, non-existent tier beyond 3GB and before “unlimited”, I am wondering … is it SIMple DoublePlus (with the highly relevant Nineteen Eighty-Four connotations) or SIMple Plus Plus (for the techo types)? 