Re: Who for?
If you want a Linux computer from the word go, then perhaps yes. But that wasn't what I was saying, it was about what you could (and should be able to) do with an older Mac, once you had been happily using it as a Mac for several years, but then Apple stopped supporting it with OS updates. Microsoft is perhaps almost as bad in terms of ending OS support for older hardware as well.
The fact that there are also vendors out there who sell supported Linux laptops is a good thing, of course.