I think the concept is that pushrods are obsolete, regardless of whether they were introduced after OHC or not. OHC is the modern acceptable valvetrain design. Yes I am aware that GM still employ OHV in their LS engines, and im sure others still do too. I wont try and debate which is a more efficient design, im not an engineer. But many feel that is the consensus.
I just love the term because i find it a humourous play on words.
Plus it makes my opinion on the matter more obvious to those that blindly follow what is fed to them (not that im trying to imply this on my fellow forum members). Thats all.
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