Wondering about sway bars

I saw an interesting video on YouTube this afternoon discussing the hidden drawbacks to sway bars. The guy making the video seemed to be talking specifically about his experiences with sway bars on Miatas. His argument was basically that sway bars reduce grip because while it keeps one wheel planted it unloads the opposite wheel. Anyway he seemed to have some success running his car without sway bars. I'm wondering if someone here has some meaningful insight or experience with running their fiesta sans sway bar or with a modified setup.