Earlier quoted context omitted.
For good and for bad. Its strengths are available to all and its gaps (melody!) and quirks (lack of variation) impact everyone’s development.
This was true of the real book too. Quite a lot of the songs have incorrect transcriptions, sometimes they use a different key than the original, or the "original" key when a different one is more commonly heard. All editions of it I've seen have this to a significant extent, of course with differences making it even more confusion sometimes. And a lot of natural variation has been elided with these tools, a lot of j…
Yep, it’s just the learning process. But when there’s a monoculture of learning tools, the downsides can become a communal gap.
A looper pedal and an AirStep Play are helpful antidotes for me.