Italians are quite keen on bidets. My (Italian) partner always complains about the lack of bidets here in Germany (and anywhere else we go).
Germany should have bidets like any other civilized country.
I dare to mention, that a lot of bidet development has to do, with the lack of piping that could handle large congesting cellular clumps of matter.
So - the more recent the canalisation - and the bigger the pipesizes used, the less need for biddets.