agreed = and the many actors who DO write their blocking and take notes (and add in directors notes) will not be happy.
But most of all, it would make me nuts to run rehearsal or a show w no paper script. Tracking all the versions of blocking, verbiage going in and out, jumping around, all are easier with paper. During tech, going Q2Q and moving things around. During the run - jumping between pages (finding the spot if an actor jumps, or if the next cue is several pages ahead so I have flagged my s/b), or calling from a booth where I need it super dark to see and only want my tiny pin light (which sometimes is turned off) to call.....and the many, many times technology has failed and I have had to rely on old school techniques and quick wits - all those reasons and so many more make me want to always have access to a hard copy i can write in.