I don't know the official position, but it is controversial. In the past, no. The thinking is, if you cut a brake line on a rock, you lost your ebrake too. Single point failure.
I have a driveshaft ebrake. Vulnerable to breaking an axle (unlikely), but in 4WD the other axle stops the truck too. Not a single point failure.
Heb Dduw, heb ddim; Duw a digon
I'm that gun-totin', farm-raised, evangelical, pro-environment, OHV ridin'/drivin', Southern civil rights pro-labor Liberal yo' momma told you couldn't possibly exist.