Comment by koyote

I had the T431s for over a decade as well.

Replaced the keyboard (orange juice spillage), screen (upgraded to a higher resolution panel), hdd (to an SSD of course), RAM, Wifi adapter (Wifi 6) as well as the battery.

I now use an X1 Nano and while it's nice (and very light!) I am sad that the upgradability is nowhere near as good.