Are chastity devices becoming standard in Gay BDSM?

Over the past three years, since the pandemic, I have been with three Doms, all of whom insisted on long-term locking in chastity. Is chastity becoming the new normal for Doms training submissives?

The first Dom had been locking subs in chastity cages for over 20 years as he liked to control their orgasms, turn focus to their butt holes and teach that only his penis matters. The second Dom has two other subs who were locked long-term in clear cages as he liked the look of a locked cock struggling in its constricted space. The third Dom also had other subs already locked and insisted on using the CB3000s regardless of fit or comfort. That cage has worked for his other subs so it would do for me and others.

Has the use of chastity devices by Doms for subs become a standard requirement in Gay BDSM?