Audio software tends to experience breakage even after minor iOS releases. For example, Apple have once changed the in-memory format of MIDI sysex messages pass

Audio software tends to experience breakage even after minor iOS releases. For example, Apple have once changed the in-memory format of MIDI sysex messages passed to the app in a dot release. Segfaults ensued. The particular callback wasn't documented well and some OS behaviors had to be inferred. Apple still went through with the change, not noticing or maybe not caring about consequences.