I hear you about it being portrayed as central to a Ds relationship. Unless both are enthusiasts and that is their joint fetish, it is a pretty hollow relationship if one partner believes chastity is the glue that holds them together. Yes, devices can get bulky and impractical. There was a company, years back, that made custom made welded devices that worked amazingly well. Sadly, the man who made them passed and the company closed their doors. There are cool short term devices. But, that was the only long term that I am aware of.