My home computer (which I also use for smart working) is from 2010, I updated it with a couple of SSDs instead of mechanical hard drives and I added 4GB of ram (totalling 8GB) but it is perfectly capable of my working needs. I only have Linux on this PC (and I only use Linux at work too), so I think this is the main reason it's aging so well. Other colleagues with Windows have various slowness problems, with more recent machines.