I was thinking about this, and is it because the tolerances for warped
rotors have gone down or ???

My big old american rustbucket beaters never had warped rotors.  My
wife's Beretta warps them just sitting in the driveway.

I do sometimes question if new and improved really is new and improved,
and in this case, the "old way" of brake jobs seemed to have resulted in
a lot less problems with warped rotors.

Sometimes "old school" isn't so bad - it's hard to mess up something
that doesn't require precision.  I liken it to the difference between
the drawing board (CAD screen) and the real world.  On the computer
screen, your "dog-lick" engineering solution looks really sexy, but in
the real world, it fails miserably.

That said, I don't miss carbs.  To me, FI is actually simpler to
understand and repair.

Ray