BFL. I have an old C2D laptop I need to load this on. I think it has a chance of being a good web surfing machine with a SSD.
I have an 8x core running 2.70GHz and Kubuntu will take anything I can throw at it. I closed three browsers(I like tabs, lots of them) and 5-6 other programs last night and then shut down. Still less than 5 second shut down time. Plasma had mobile in mind when it was developed. There’s a version for cell phones.
If something that runs Plasma doesn’t work, Xubuntu and Lubuntu are good. I’ve tried all the other lightweight versions of Linux and didn’t care for them.