I've spent 30+ years at the intersection of musicality and resolution, and would like to add that musicality without resolution can work beautifully, but resolution without musicality is just a waste.
It's funny, but the situation is a tad more complex than you might expect.
Back in 1994 I introduced a speaker that went on to sell by the tens of thousands, got rave reviews and is still in prized by owners and on the used market. Kestrel. What made Kestrel special was NOT its resolution - which was merely "good", but its endearing emotive abilities. The trick was that the resolution was uniformly "good" from top-to-bottom. So it really hung together and expressed the music.
I was a newbie at the time, but noticed pretty quickly that, when guys requested a tweeter upgrade - yeah you'd get more resolved treble - but the speaker, as a whole, the speaker didn't work as well. I quit complying with those requests - you need to up the game across the entire speaker.
Really, you can just
buy treble resolution. But midrange and (especially) low frequency resolution are a very different story. Top level treble is easy, yeah, but it needs to be part of a highly resolved whole to work out. It's that lack of balance that robs you of musicality.
But it's more than just detail resolution.
When you pay the price for an excellent tweeter two properties come in the bargain - detail resolution, of course, and near ideal dynamic resolution. The DR resolution just kinda naturally "falls out" of top tweeter design and execution. But that's much less true in the midrange and is an out-and-out battle in the bass. Truth be told: near ideal DR in the bass is exceedingly rare. And expensive.
I'll bet that the big, expensive systems noted as 'wanting' by the
@prime minister had shortfalls, not so much on detail res, but on their evenness of dynamic resolution.