Earlier quoted context omitted.
I'm still rocking a 2008 Lenovo X200. It's just fine for home use but it's pretty hot, slow (the blame is split between the slow CPU and the slow HDD) and noisy. Also at this age the battery is mostly good for power spikes and the screen is in permanent "night shift mode" (backlight is yellowish). Still chugs along.
Am using the same. I advise installing an SSD and thinkfan or TPFC. Mine is mostly silent (except when watching video)
I didn't replace the HDD because the longer load times aren't really an issue. It's the parts that require some processing power that are a bummer. And this is also where the noisy part comes in, given that it's in high load for longer stretches. I prioritized lower temps over lower noise, this may have helped with the longevity.
I might throw in an SSD just to show the little workhorse some love.