I always felt like z&p was confusing, especially for newcomers/beginners and (likely) people who have different ways of reading like visual impairment, neurodivergence, and people who don’t speak English as a primary language. It also confuses search results to a degree.
I’m sure that it may have some upsides in terms of being “fun”, but I never felt like that outweighed the negatives.
Though it did make obvious the non-real measurements that gf began using as it forced people to stop and think about it as it wasn’t “speed” in a recognized measurable rate, nor “power” in a recognized standard of measurement.