Took ages to produce answer, and only worked once on one model, then crashed since then.
voidspace
I have friends who live there, and they report the same. They visited us for the first time here in London recently, and were quite shocked by the stark differences.
This happens ( was exposed) at our local foodbank. (London, UK)
By remembering that we're all hypnotised by conditioning and are deluded in varying degrees.
It's not personal. Inquire within and see if you can find the "I" who is affected.
I used take other forms of Magnesium, but recently found Glycinate has made a massive improvement in my sleep.
Best sleep I've had in years.
I should add that while I'm not specifically a "Jazz Musician", I play piano , and utilise substitutions, extensions etc. :)
Its the same kind if vibe as when you hang out with certain Jazz musicians / fans and they start discussing chord substitutions, extensions, etc.
I started my own GoToSocial instance this week, and found the same. TBH, from my exported list of about 160 people I from followed on Mastodon, I only re-followed 6.
These were all longstanding relationship - a couple of which started on Twitter when it was OK.