It seems weird to try to characterize Julia in terms of object-oriented programming. Is that just me? Julia's approach to subtyping and multiple dispatch is sufficiently different from the C++ and Python approaches to OOP that I don't even put them in the same bucket, and it seems about as far away from CL's objects as well. Julia doesn't really advertise itself as OO; you can't even find the word "object" on the front page of their site. So I wouldn't try to think of it that way.
A lot of the comparisons in this article seem like that to me. Julia and Common Lisp are apparently just close enough to make a point-by-point comparison like this plausible, but things are not quite aligned close enough to make it work. It's still a good article with a lot of solid meat in it, but I think the topic would have been better served by going up the abstraction ladder a bit and talking about how the different paradigms of each language motivated the differences between them.
Disclaimer: I'm only somewhat familiar with Julia and not at all with Common Lisp.
A lot of the comparisons in this article seem like that to me. Julia and Common Lisp are apparently just close enough to make a point-by-point comparison like this plausible, but things are not quite aligned close enough to make it work. It's still a good article with a lot of solid meat in it, but I think the topic would have been better served by going up the abstraction ladder a bit and talking about how the different paradigms of each language motivated the differences between them.
Disclaimer: I'm only somewhat familiar with Julia and not at all with Common Lisp.