You forgot to mention the 256GB SSD.

I had a Macbook Pro 2015 with 256GB SSD. (Base model was 128GB). It was a very painful experience even back then. Yet almost ten years later, we are here, still paying $200 to upgrade to 512GB, when almost every Windows laptop comes with 512GB. FYI a 1TB NVMe gen 4 drive costs less than $100.

It's hard to believe, but people can be in the market for a product, but feel that paying 8x markup on the cost of an upgrade is ridiculous.

It's 20% more.