It is worth to know that many many many people out there don't know what silica gel is, not to mention drybox and drycab. Just like ozonator.
So when they upgrade from compact to more expensive prosumer or dSLR, then they are introduced to such item by salesperson. Thus there will always be a process of justification to get one of these unknown item and the need for the large effort (in their mindset) into aquiring/transport one. Some people got this zen home concept design that adding any item require proper planning, else will destroy the zen spiritually.
Similar to CCTV at home, many knows what they are but require strong justification too bec it intrudes privacy and needs wiring and periodic review.
How many of you have proper vaccum cleaner at home, raise your hand.