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I don't know why some people are so surprised that I actually use and daily drive these two beauties.
(lemmy.world)
Left: X61S with 4GB ram.
Right: T530 with a bunch of upgrades.
I still rock a T430 with a quad core, SSDs, 16gb of ram and a upgraded 1440p screen. Works well with Window10 and Linux. I did the T420 keyboard mod so I still get the older keyboard.