The X1 is an ultrabook (or at least the continuation of ultrabooks) and not so repairable. The T series though sacrificed a little weight and thickness for more

The X1 is an ultrabook (or at least the continuation of ultrabooks) and not so repairable. The T series though sacrificed a little weight and thickness for more durability, expandability and servicability. The sacrifice was pretty small though - I thought it was worth it when choosing a work T490 over the X1 a few of years ago. The bonus was that for the same budget as standard Macbook Pros at work, I got 32GB RAM and the top i7 plus a thunderbolt dock.