What I actually suggested in that interview was not so much that the BSDs should adopt the Linux APIs, but instead that people should just forget about the BSDs. Full stop.
In the first sentence the article declares "portability" a key concept in the open source ecosystem. That's a claim I don't agree with at all. "Portability" might be something rooted in the darker parts of Unix tradition but I don't see how this matters to open source at all. The fact that Unix was forked so often is a weak point of it, not a strong point. And only that forking put portability between OSes on the agenda at all. So it has something to do with the history of Unix, not with the idea of Free Software. And caring for portability slows down development.
I have a hard time understanding why "portability" in itself should be a good thing. it doesn't help us create better software or better user experience. It just slows us down, and makes things complicated. If you decide to care about portability you should have good reasons for it, but "just because" and "it's a key concept of open source" are bad and wrong reasons. (good reasons sound more like: "i need to reach customers using windows")
There are couple of other statements in this text I cannot agree with. Claiming that the fast pace of development on Linux was "a problem" is just bogus. It's neither a bad thing for Linux nor for BSD, since even the latter gets more features more quickly this way: in many areas the work on Linux does trickle down to BSDs after all. What *really* might be problem for BSD is that BSD development is otherwise really slow.
And on Linux, if we ever want to catch up with MacOS or Windows we probably even need a much faster pace.
And the last sentence of the article is actually the wrongest statement of them all: "The innovation of Linux inevitably comes at a price: Linux is the de facto Unix platform now, ..." -- wow, this is just so wrong. I'd claim right the contrary! The Unix landscape was splintered and balkanized during most its history. We finally are overcoming that, and that is a good thing -- that is a fantastic thing. That's not a price you pay, that's a reason to party!