I am sorry, but I find it ridiculous to claim that X220Ts had "great build quality".
When the X2x0 series were released we did complain A LOT about the drop in quality and reminisce about the good old Lenovo times. And of course people already complained about the Lenovo times vs IBM. And I ponder if people used to complain about the drop of quality in IBM times...
But seriously, the X220T specifically is crap. We bought 4 of them and NONE of them survived the first year, with a myriad of failures, including mute microphone/webcam, broken display flex cable, and screen that would not stand in place (it would just fall instead of staying open). Lenovo then replaced them with X230Ts and ALL of them had this issue where the microphone would have a terrible electric noise when the webcam was on (common issue too, google for it). By the time the X240 was released, we just gave up -- no trackpoint click buttons!!! what were they thinking!