Agree. tx bivectors squares to 1 giving hyperbolic rotations, while xy bivectors squares to -1 giving euclidean rotations.
saying time and space aren't different because spacetime exists sounds like saying electric fields and magnetic fields aren't different because EM field exists.
>like saying electric fields and magnetic fields aren't different because EM field exists.
Funny you should say that, because this idea is well known as S-duality [1] in Quantum Field Theory (and more generalized in String Theory). In fact, if magnetic monopoles (read: charges) exist, you could already see that simply by looking at Maxwell's equations and replacing E->B and B->-E. If you also know a bit about the Maxwell bivector, it's easy to see how closely this duality mirrors how space and time are related.
saying time and space aren't different because spacetime exists sounds like saying electric fields and magnetic fields aren't different because EM field exists.
seems to miss the point of unification.