All member of nobility lost their privileges early in the Weimarer Republic (1919), but they were allowed to keep their titles. Many chose to drop those as well, but some keep them to this day.
My (one guy on the Internet) impression is that the majority of British still support their nobility (as demonstrated just recently when Queen Elizabeth II died), while in Germany only a minority does. I can't help feeling a bit pity for those clinging to their titles, particularly if they make publicly a fool of themselves like Karl-Theodor Maria Nikolaus Johann Jacob Philipp Franz Joseph Sylvester Buhl-Freiherr von und zu Guttenberg (!) [1] or this "prince".
[1] https://de.wikipedia.org/wiki/Plagiatsaff%C3%A4re_Guttenberg
