If transistors would not be possible, then lots of other stuff would not exist, like solar panels or digital cameras. Handy electricity conversion, etc.
I think alternativly we would have miniaturized vacuum tubes much more, the ones that powered computers before transistors (and made them huge)
Surprising to me - size reduced vacuum tubes happened and it's still being worked on in as I understand it. There are some quite miniature working vacuum tubes - if you search you'll find more information.
I think alternativly we would have miniaturized vacuum tubes much more, the ones that powered computers before transistors (and made them huge)
https://en.m.wikipedia.org/wiki/Vacuum-tube_computer