iBooks wasn’t replacing a previous offering, and I don’t think it was abjectly terrible, just limited.
iMovie is a better example but I still think it was a decent update for the software’s target audience. And they offered everyone the older version for free! An even better example might be Final Cut X, which I actually think was a great product but for a very different audience for FCX.
The through-line is that these products were good products-they did something well and without bugs—but they weren’t targeted correctly, ignoring the needs of an existing customer base with (completely reasonable) expectations. That’s different in kind from something like iOS 13.
iMovie is a better example but I still think it was a decent update for the software’s target audience. And they offered everyone the older version for free! An even better example might be Final Cut X, which I actually think was a great product but for a very different audience for FCX.
The through-line is that these products were good products-they did something well and without bugs—but they weren’t targeted correctly, ignoring the needs of an existing customer base with (completely reasonable) expectations. That’s different in kind from something like iOS 13.