Fair enough but Lenovo doesn't solder their SSD. Nothing prevents you from buying the cheapest option and upgrading yourself, e.g. Lenovo thinkpad X1 Extreme has even 2 SDD m.2 slots. You also don't have to max out you storage when buying because you can always upgrade it in the future once you need more storage or when SSD gets even cheaper few years later. On top of that those 2 m.2 slots allows you to put disk in raid 0 or use second one with optane memory once its cheaper and worth it.
https://imgur.com/a/ug87MaI