Best used ThinkPad to buy in 2020?

Spoiler: not T440p

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Sources in order of appearance:

CES 2018: Intel showcases Kaby Lake R laptops by PCWorld
https://www.youtube.com/watch?v=YZBuQWMycdM

Intel Core i7 7500U & GeForce GTX 940MX Cinebench R15 test by TR 37
https://www.youtube.com/watch?v=S91dGFeF0lY

Lenovo ThinkPad X1 Carbon, T480 and T480s: Which to Buy? by MobileTechReview
https://www.youtube.com/watch?v=gOsERJzMhLc

$999 Lenovo ThinkPad T490 and the thinner T490S by Charbax
https://www.youtube.com/watch?v=yd0v9ZHBQOU

Lenovo ThinkPad T480 Unboxing Quick Teardown by IT FIX
https://www.youtube.com/watch?v=0EMQfJIFLtc

Benchmarks, tech specs, weight, battery life
https://notebookcheck.com

eGPU w grach - czy warto? Testy w Metro Exodus, Battlefield V, Wiedźmin 3, GTA V
https://www.youtube.com/watch?v=kDv-TM6iWsQ

A FrankenPad Story: T25 with Quad-Core CPU and UHD LCD Panel
https://kitsunyan.github.io/blog/frankenpad-story.html

Music:
Abloom - Blue Light

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