I don't see where it makes any sense to compare an ancient used end-of-life x86 laptop with a brand new ARM SoC in any of the relevant categories, such as price, form factor, power consumption, availability, and even support.

Just for context, you can fit about 10 raspberry pi 4s in the same volume you fit your used laptop, and for the price of an old end-of-life Thinkpad you can buy 5 or 6 RPis. Hell, you can go to any online store and buy dozens of RPis in a couple of clocks and have them delivered to your doorstep in a few days.

Meanwhile, your cheap Thinkpad is already in the tail end of its bathtub curve.