Earlier quoted context omitted.
I bought a Warhammer set during Covid and was amazed at the detail, compared to the 1990s stuff I had as a kid. I can't say what's more difficult to manufacture - millions of identical bricks that snap together, or a huge range of different, detailed designs which fit snugly together but don't lock. Just the first thing on the home page: https://www.warhammer.com/en-GB/shop/Deathlords-Mortarchs-Ma...
> millions of identical bricks Clearly you are not aware of the extraordinary range of Lego pieces.
Just from a quick search, within a year Games Workshop offer about 3000 different model kits, each of which will contain ~1-4 unique moulded sprues. There seem to be at least 50 new kits each year, possibly 100, otherwise what's available rotates around the older kits.
Lego have produced about 15,000 different sets since 1950, and a huge number of the parts are shared between sets. (That's the whole point of the toy, no?)