At one time the "concept" of a totally "electronic" pp was supposed to be the "new norm"--that was MANY years ago. Now (nearly 2022) why isn't this EP being used?
Many countries don't have ability to process such a thing. Issuing a PP with a chip has been hard enough for some.
We (US) still get stamps ebtering/exiting Schengen because there's (till next year) no system in place to electronically verify haven't over stayed in Schengen.