Raspberry Pi is actively preventing enthusiasts from upgrading soldered memory to a larger configuration even when the replacement chip is technically compatible. The company says the restriction is intended to discourage unofficial high-capacity resales.
For what it’s worth the original point of the Pi was to recreate the experience of the Commodore 64 or BBC Micro where they came with huge manuals with ample examples and were more or less bare hardware for cheap. Taking that metaphor all the way is how we got the 400 and 500.