@galena @noyoushutthefuckupdad @coolboymew To be fair, most of this isn't so ridiculous. A lot of technology is not as complex as we like imagine, and even what we'd consider primitive people often had access to lots of surprising raw materials. Primitive tech does not need to compete with modern tech to be useful, it just needs to out perform everything else in it's place.

The bigger issues are:

>The timescales involved with making something, without a single mistake in the design.
>Lack of trained craftsmen/economy of scale. There should be no way that Senku could have made working vacuum tubes, even if he had all of the materials and knowledge needed to do it.
>There is no way anyone could remember how to do all of that stuff perfectly.

But the point of a show like Dr. Stone isn't to be realistic. It's about a kid who is an unparalleled genius showing us how technology works at a very basic level.