Adding RAM aftermarket is not important. Paying a reasonable price is. If Apple didn't charge $100 per 4GB of RAM (actual retail price in absence of lock-in: $

Adding RAM aftermarket is not important. Paying a reasonable price is. If Apple didn't charge $100 per 4GB of RAM (actual retail price in absence of lock-in: $20) and just shipped 16GB on every device at a fair price, there would be no problem (except Apple couldn't soak their whales for upgrades and replacements