There are several other solutions or rather variations on the open/closed.
One can also draw a vacuum on there crankcase by using a pump or the method I use. I have tubes welded into the collectors of my headers. braided lines rune from the tube, through a check valve (anti-backfire) and into the breathers. The exhaust "sucks" on the crankcase in proportion to RPM.
(Cheap kit ~ $40 from Moroso)
I don't burn oil...at least no on purpose.