I still love mine, and I love the replaceable battery and the fact that you can still get batteries.

but best laptop in the World?

I do use mine, occasionally, it's a great work horse around the house for network things as it has an ethernet port.

but TBH I use my X1 laptops more, the ability to USB-C charge is near critical now, and the X220 lack of USB-C as well as low res screen really does mean it's not a machine of this age, it was probably the best laptop of the non-USB-C age... but now it's dated, and only has niche use.