There is no NEW OTD phenomenom, People have been going OTD for centuries, Conversions , The Haskallah, The Reform movement Chassidism (Dont forget the Vilna Gaon excommunicated Chassidim) emigration to america etc.
The only differnce now is one you are not intersted as are most of figuring out what to do, The only goal today of such discusssions is to “prove” whatever you thought was the reason “IS” the reason Like “See it was the Internet” , “See it was movies”.
The reality is today religion in general is on the decline. 30% of Americans do not belong to an organized religion. Its not just judaism, Its christianity as well. You think you know alot of OTD’ers. Look at the Catholic church. Most Catholics today are “OTD”. And this is in America. In Europe its even higher, even in catholic countries like Ireland and Italy.