Tangentially related anecdote: I came across a site the other day that requested access to the MIDI API for no apparent reason. Is this a common tracking vector

Tangentially related anecdote: I came across a site the other day that requested access to the MIDI API for no apparent reason. Is this a common tracking vector? The available MIDI interfaces can say something about the system but in 99% of cases (the 99% that don't have any physical MIDI interfaces) I don't imagine that you'll discover anything other than operating system family.