Does Duplo have the same level of quality control as Lego? Like I can go and buy 10,000 1 x 1 Lego pieces and be sure they'll all be exactly the same within about 10 micrometers. Are Duplo bricks also as insanely QC'd as Lego?
I have a lot of Duplo, some are new, some are 20 years old and went through a few toddlers. I can feel difference in tightness. The new ones are much better. Maybe Lego did improve the quality of the Duplo overtime, or they are simply less used.
In my case, I also find the old transparent bricks to not hold so well. They don’t handle much load before detaching.
https://bricks.stackexchange.com/questions/38/are-duplo-bloc...
Interestingly you can build things that incorporate Primo, Duplo and regular Lego bricks!
Same manufacturing quality. Or even stronger design and QA checks as it is expected that toddlers will play with them.