I agree with the article. I'm also still on a 10 year old desktop computer. An i3-4160 with integrated HD 4400 graphics. No dGPU. It works still fine for many things, e.g. internet, documents, 2D image editing, audio editing, 3d modelling (blender) and animation, smaller projects in Unity game engine, casual gaming (titles before 2010). Though as I mentioned in a previous post, the biggest difference in performance made a SSD versus a previous HDD.
A lot of universal tasks can be done just fine - contrary to many people's opinions in forums and youtubers, who act like you will always need the latest and bestest, every new year of course, and if you don't, you can't do s#it. Which is B.S.
The thing where I personally realized it's too slow, is video editing, screen recording, newer gaming. These things definitely need a better computer. There is no way around that. But for other tasks, even a 10 year old computer will probably do. But even if you need a better computer, it's debatable if you need one with a dGPU or if a more current iGPU is enough, since these have become much stronger.