Contact AppleCare, immediately ask for a Tier 2 advisor, and insist they file an RTA (Request for Technical Assistance). RTAs go to engineering directly.
I 100% agree though, as someone who supports a wide range of macs, APFS can absolutely cripple anything with a fusion drive / hard drive, and it's particularly infuriating because Apple sold models with JUST spinning rust for wayyyyy too long.
I 100% agree though, as someone who supports a wide range of macs, APFS can absolutely cripple anything with a fusion drive / hard drive, and it's particularly infuriating because Apple sold models with JUST spinning rust for wayyyyy too long.