Lucky for me I don't mind the differences between SA and DSA on MX red switches. I like them both just fine.
Is there some wobble with SA caps? Sure. Does it bother me? No; I'm too focused on what I'm typing to even notice.
Is there a difference in sound and feel between SA and DSA? Sure. Does it bother me? No; I like the difference, sort of like the difference between sweet and salty. I even like going back and forth between them during the course of a day.
Full disclosure: I only like MX red switches (and Topre too, I guess, but they need to accept MX keycaps before I'll ever use them), I only like 45cN of spring force, and I only like spherical topped keycaps in vintage terminal colorways. So I guess you could say I am as much a Princess bothered by that Pea as the rest of you guys. But not only do I not care about the differences that material, height, and thickness present, I embrace them for the interesting diversity in (slightly different) typing experiences they offer.
At the end of the day, we like what we like, and data sheets and ergonomic studies aren't going to change that for any of us. Nor are technical (and psudo-technical) rationales going to convince us to like or dislike something we don't already like or dislike.