Clearance angle/back bevel

As i sit here watchinf The Shield reruns, have read multlpe times Soupijg up Block Plane by Newman-

i have multiple plane choices, but have ground cambers into blades..... Then it occurred to me i could jyst buy multiple (not infinite) blades for same plane.... Wow

so-seems like a no brainer to put a back bevel on a bevel up plane----up to a point, right? When does decreasing the clearance become a problem?

Tear out is issue, right?

i mean, a back bevel on bevel up plane will give better edge retention (greater sharpening angle)

Do i have basic idea?

(1ca)

Clearance angle/back bevel