Dr Stone interrupting the flow of the story to tell you how to make bootleg coca cola is exactly why I watched it. I really don't care why there's some magic rock on a string allowing some guy to fuck many virgins like some Redo Of Healer antagonist without the sex scenes. The last season I watched, it was like "we need science..." "Oh, science was done off-camera! Back to shonen battles!".

It reversed its A-plot and B-plot. The show originally had a mystery-adventure as a plot excuse to show cool science stuff, and changed into having cool science stuff as an excuse to show a mystery-adventure.