LF CR was always wrong. On a real TTY, it often takes longer than one character time for the CR to execute. CR has to accelerate and decelerate an actual physic

LF CR was always wrong. On a real TTY, it often takes longer than one character time for the CR to execute. CR has to accelerate and decelerate an actual physical mass. LF CR did surface briefly in the early days of PC’s, I can’t remember where, but before the days of “glass teletypes” you learned very quickly not to do that. Adding a couple of NULs to let the print head settle down was sometimes necessary if you really wanted clean print.