There are other 5k options for half the price of the Studio Display. Still more expensive than 4k but the difference in quality is not marginal.
Well, there's only a couple. Last I looked, the Samsung had some rather lukewarm reviews (for the price) the Benq wasn't available, priced or properly reviewed yet, the ASUS certainly looks credible but is
still twice the price of a fairly decent 27" 4k display - let alone a more basic 4k which would be more than adequate for the OP
who said that they are primarily using it for music production (which doesn't really need P3 gamut or HDR/HFR...)
. For the price of 5k you could get a dual 4k 27" setup - so one screen for your tracks/timelines, the other for mixers - or whatever suits your workflow. Then there are the possibilities of 3:2 or ultra-wide displays (same PPI as 4k) which going 5120x2880 rules out.
For years I used a cheap & nasty 4k (it was £400 in 2017 when that was silly cheap for 4k - sort of thing you could get for under £200 now) first on a Hackintosh and later as a second screen for a 5k iMac. The "cheap & nasty" bit showed up in the poor colour reproduction (& awful case & stand) but the screen was very, very usable for non-graphics work either in 2:1 mode (pixel perfect but slightly large UI) or scaled mode (giving the same UI scale as the iMac).
Yes, the display in scaled mode looked very slightly "soft" alongside the 5k iMac but - in my experience - once you stoped looking for differences and just started using it, that was rapidly forgotten & it was certainly perfectly good for DAW work.
Of course 5k is better than 4k - not denying it - although YMMV (or, rather, your eyesight may vary) whether the UI size on 5k@27" really is "just right" or actually a bit small & fiddly. However, I think the disadvantages of 4k are widely overstated
especially if you're not using them promarily for fine graphics work - as is the issue of the large UI in 2:1 mode (depends on what apps you use, whether you work full-screen/dock hidden or not).
If price is no object, by all means buy a Studio Display. The Pro XDR or another 32" 6k would be even better - or maybe go the whole hog for 8k (why not pay the price of a small car for something you're gonna be spending far more time using than you do driving your car?)
However - if you don't have bottomless pockets - given the price difference and the possibility of all the extra affordances of a dual-display setup, ultra-wide or 3:2 screen - 4k is a pretty good compromise. Heck, even if you don't like it & save up for a 5km anyway, you've only spent a few hundred bucks for something that will still be very useful as a second screen.