Really?
Our local store says the T440s has 4 GB RAM, and max RAM 12 GB, that would suggest 4 GB soldered and one SO-DIMM slot. And the machine has traditional HDD, which should be easy to remove and upgrade. That's not as good as two RAM slots (for 16 or 32 GB of greatness), but better than everything soldered-on.
I love the design. Totally. Black box of cyberpunk glory.
But. But. With aftermarket 256 GB SSD and 8 GB RAM, it costs more than rMPB 13" (with 8/256GB) here. That's a lot of money for computer that's worse in everything but having upgradeable RAM and storage, Ethernet, and a nicer design. Everything else about the Thinkpad is worse -- CPU, GPU, SSD, wifi, touchpad (come on, it's windows laptop). And you have to fiddle with linux to get reasonable OS.
Damn, I'm so sad now. But maybe you're lucky and Thinkpads aren't as overpriced wherever you live.