The Mac Studio proves that removing consumer upgradeable storage is NOT to save anything in dimensions, it is to try force users to pay their exorbitant upgrade prices. Which of course many people can't afford/won't do, which means that they are pushed to solutions such as 75MB/s SD cards...
It's ********.
Even Apple shareholders must see that this is something that keeps switchers away from Macs, and creates a worse user experience all around when users are pushed to external hacks for storage - which, incidentally, creates no revenue for Apple at all. This situation is just thoroughly bad.