I think she's disagrring with the idea that the 80s had as much diversity of product as we do today. And, to that, I think she may have a bit of a point. Yes, there were lots of different products in the 80s, but while they'd differentiated a lot in genre, the mechanical designs used and playstyles supported were still fairly narrow. These days, in terms of well-considered mechanical support for various playstyles, games are much more diverse. The decades of experience have been good to us.
I dunno. There was lots of new mechanical stuff back then. I remember the first dice pool system in the Ghostbusters RPG. The very idea blew me away! When Call of Cthulhu first came out - my first experience of gritty horror gaming. Toon. FASA Trek. The introduction of life path systems with Traveller or WFRP (whichever did it first?) And all that stuff TSR did. And then White Wolf comes along, and does all that stuff.
I feel the 80s were a hive of industry and innovation. So many things we take for granted now as being standard or cliched were forged back then.
Production values - I'll give you that! 80s production values were generally awful (although bigger companies like TSR put out some nice stuff). To be fair, they didn't exactly have the equipment we have now. Though there were more boxed sets, which is a good thing.