I'm using X220 from 2011, it has i7, 8GB RAM and SSD, running Debian Linux. I don't even feel the need to upgrade. It's in ideal condition, I love the keyboard and form factor, and for my daily tasks mostly involving terminal, text editor and web browser if feels snappier than many modern machines I have worked with. I bought a new Dell laptop for my wife a year ago, and while the CPU and GPU are obviously way more c…
the 1.8 Ghz dual core was getting long in the tooth. But it had upgrades otherwise (newer ssd, though i had a factory ssd from day 1), and upgraded to 8GB of ram. Ran multiple linux distros on it great, including debian with awesomewm and even ElementaryOS.
I will not admit what i bought to replace it, but im happy for the time being and it replaced by desktop and laptop in one (but wasnt cheap). I know theres no way it has the longevity i got out of that x200s.
Technically the x200s is still in service though. I let my daughter use to get better with mouse/hand-eye coordination and do some reading/website work on it.