Sort of a moot point when it comes to Mac notebook computers released after 2017 where the SSD is not upgradeable...I'm sold my old MBP 2011 in original base configuration with 4GB RAM and 500GB HDD, because I was able to sell 16GB RAM kit in original package for better price separately and I'm used my Samsung EVO 500GB SSD in external case.
And I'm sold my sisters XPS 13 with base 256GB GB and kept Samsung EVO 1TB M.2 NVMe SSD to use it in her new XPS 9310, which was bought with base 256GB SSD.
XPS 9310 i5+16GB+256GB was 1199€ and 1TB version was available only with i7 for 1599€.
Upgrading SSD by yourself and reusing it in the next laptop or using it as a external drive is always much cheaper than getting overpriced upgrades from laptop manufactures.