I have some small quibbles with that article (which to be clear, are extremely semantic). If you're going to include trash years with similar cores like the 2012 Red Sox etc in windows, then the Jays 2013-2014 should be included as well. I'd even argue that 2006-2008 was a 'sustained attempt at winning playoff series' but can't exactly fault the author for not including a team that didn't finish within 8 games of a playoff spot. In fact from a quick look only a small handful of eras where teams finished with 3+ consecutive .500 and above seasons aren't included, and the Jays have two of them (1998-2000 and 2006-2008). Which speaks to the AL East of that era more than anything.
The money part, of course, is bang on (refer to the '85-'96 Jays).
Also as predicted, not trading Donaldson in the offseason will go down as a completely moronic move.