Really?
JFC.
I’ve gone into this numerous times because of the general misapprehension particularly re Ionian v. major scale.
Ionian scale, sure, it’s identical to major.
Major scale has a key, and lives in the land of tonality. Tonality means a particular drive to the tonic chord (if sometimes belayed or subverted for a moment). Major scale’s 7th degree is known as “leading tone”, ie., 7 leads to 8. Part and parcel with dominant to tonic harmonies.
OTOH, there is music that uses the same 7 tones modally. In Indian Classical Music, the “Hindustani” (northern) theory, one of ten parent ragas is known as Bilaval; westerners will call it a mode, there it’s called “thaat”. It doesn’t involve harmonic movement at all. ^7 may move to 8, but probably (far?) more often than not it does other things. Their theory of composition insists on preferred shapes known as Vakra, which I see related to ‘zigzag’ in English. I’ve studied a fair few raags and I don’t suppose 7-8 is highly preferred.
Frank Zappa’s Watermelon in Easter Hay is E Ionian. The ^7 is never leading tone. The harmony is IV - I again and again with an ostinato.
D# is the first note of the melody, on the IV. It goes to B, then to A-G# on the I. Later it occurs on I as a nice major 7 with no need to resolve.
It’s not tonal. There’s no V-I.
“Tonal music” is intrinsic to functional harmony. At the outset of our tonal period having pretty much eclipsed modal polyphony, one feature is making a minor mode functional, ie., as though there’s a harmony unavoidably attracted to a ‘i chord’. This of course means raising the native 7 a semitone making a triad on degree 5, which was minor quality, into major quality. We call this the dominant-tonic paradigm.
Aeolian doesn’t do this.
(Now, I’ve read up a little bit on this and there is more than one school of thought on the origin of the harmonic minors. We’re 6/7ths the way to melodic minor with Dorian.)
Well, I do agree with listen, but music notation as primary here - whether this is Medieval to Renaissance or rock or fusion players on a two chord vamp or what-have-you - well, to me seems secondary if at all pertaining. (We sight sang from Neumes at CCM, and the rhythmic concept is rather different even in the high renaissance than it is by the time of this transition to our dominant-tonic paradigm.)
Not everyone cares, either.
Which takes us to “Ultimately who gives a f**k anyway”.