3 things I can think of straight away:
- WiFi-card whitelist
- Function-keys touch strip
- Fn and Ctrl keys switch
- WiFi-card whitelist
- Function-keys touch strip
- Fn and Ctrl keys switch
- WiFi-card whitelist
gone in the [x,t][2,4,5]50 series - Function-keys touch strip
existed on one model for one revision, is now gone - Fn and Ctrl keys switch
this layout is correct and is mandated in the first chapter of the Bible(I assume your reference is the 2014 X1 since you mention the touch strip)