iPad: i have thousands of music scores on it running ForScore, which I can annotate with an Apple Pencil (the cheap $99 one), I flip pages using a foot controller I built with an ESP32, and I run multiple audio and music apps on it that are extremely useful.

And it just ...works. It sits on my music stand, doesn't call attention to itself, and does the job I ask it too.

Could I do all that with some Android thing? Probably most of it. Truly differentiated tech is rare in the consumer space. It's the experience that counts, and that's what the iPad has.