My 10yo laptop already had a palm rejection built-in in its driver, thought it's a must. Not sure who might need this
Thankfully I don't use it much nowadays, but there could be people with borked touchpads too.
Those machines don't have dedicated mouse buttons for the trackpoint and use the trackpad instead. For some reason the mouse clicks became unreliable every so often, registering presses on the wrong side or straight up moving my mouse cursor to the edge of the screen - even if it was disabled in the BIOS.
The issue was persistent across operating systems, so I returned the machine and got an X250 with dedicated buttons.
I absolutely hate the T440 touchpad. Lenovo had the almost perfect design for that time with the T430: just make it bigger and out of glass, with physical buttons on the top. But no, "let's f** everything up", said some shitty designer.