Whether we use paper strips (reliable, not prone to software failures, takes 2 seconds to replace a pen that runs dry, tactile, allows for flexibility of operation, much easier to write legibly on, can be made to display useful information without time-consuming workarounds, blah blah blah) or electronic (not so user friendly, generally) is a moot point anyway.
The amount of paper used in my unit in a week is probably about the same as the amount of junk mail I used to receive in my mailbox, before I put the sign on it.
You're talking a drop in the ocean, compared to other waste areas.
Since moving to electronic strips in my tower, a significant percentage of the controllers' attention now has to be reserved for using the operating system, at the expense of moving traffic, or actually watching the runway. Doesn't matter how "whizzy" anyone is at using it, that factor will always be there.