Indeed. When someone says ワープロ, electronic typewriters are what come to mind, just like what the Japanese Wikipedia page[1] shows. The word ワープロ馬鹿 probably wouldn't make much sense to those under 30, as they're very unlikely to have ever used a ワープロ.

1: https://ja.wikipedia.org/wiki/%E3%83%AF%E3%83%BC%E3%83%89%E3...