It is a valid thing to do, and can be an actually quite tasteful thing to do if done right, but only if it serves a purpose for creating a coherence and/or tension between the trick before and after.
If done with no other purpose than creating an option to present the two hardest tricks possible combined in a line, it doesn’t look good.
But then again, this is how I look at it through todays paradime. For the time when Oyola laid out his thoughts on the matter, I would agree for how skateboarding looked back then.
I think it came in as a second wave, after the re-introduction of wallies, no complies, slappies etc. around 2010 +/- (2 years?), and obliterated the paradime which had been evolving in a straight line since the early 90’s.