Earlier quoted context omitted.
If you look at Lego Space during the 90s it is a long list of new versions (almost yearly) each with their own specialized parts. Personally I don't feel like this narrative about a substantial shift in Lego sets fits with reality. To me it feel like people conflates it with the rise of licensed sets. https://en.wikipedia.org/wiki/Lego_Space
Let's take a look at this particular small set from the old Pirates theme: 6259: Broadside's Brig [ https://brickset.com/sets/6259-1/Broadside-s-Brig ] For what was a very small and cheap set at the time, you are getting 3 minifigs and a small building on a baseplate. The bulk of the parts are yellow- and white-coloured bricks for walls and architectural elements. There is a specialised yellow-coloured edge panel wit…
Weird ski bricks, seethrou chain saw, antenna, big arrowshaped structural piece, etc.
I'm not surprised the one you linked is from 91. Noone is disputing that the complexity rose from the 80s. But the complexity we are seeing now is not a new thing. It started in the 90s.