What I have been reading from the online forums and social media is that the TB policy is being strictly enforced, at the insistence of the TB. There may be some very valid reasons for this, as I have been also been reading many comments on these same sites for the last 2 or 3 years on how more and more members are moving away from the intent of the door to door policy.
The CAF has contracts in place with moving companies that set out specific timelines that the contractor must meet, certain standards of service, for a fixed amount. The CAF wants to also be able to hold these contracted companies accountable when they don't meet the agreed upon terms. However, contracts are a two way street. The contracted companies higher staff, subcontract parts of moves, and calculate space requirements based on the information provided to them by F&E. They also expect to be paid additional fees when the CAF requirements are outside the standard terms of the contract, especially when they are being held more accountable for their service levels. I believe that in the past, if pan-CAF there were a small majority of moves that required leaving SIT greater than the contracted days, companies either waived the fees, or F&E sections just paid the bills, as the effort to track one or two individuals down for relatively small sums of money wasn't worth it.
Now though, where it might have been an exception to leave items in SIT for unseen circumstances, members are actually building that into their move plans. House is being built and won't be ready for 2/4/6 months, I'll just leave it in SIT and stay at a Air BNB or friends. RHU isn't ready, or I'm way down the list, no problem, I'll leave my items in SIT until it becomes available so I don't lose Pri 1 status. Individuals booking moves without an address at destination, because, hey, stuff can just stay in SIT. They plan this because they have heard that either no one has ever had to pay the additional storage fees, or at worst, the fees are relatively small and they'll just claim it on taxes if not reimbursed. But there is a cost to the contracted company to have to wait, reschedule, higher staff outside normal move windows to deliver and unpack. And it impacts other DND and private moves, thus potentially incurring penalties. So they want to be paid.
When in the past these "abuses" were studied, what happened? A crack down in policy, and a loss of benefits for the member. Everyone remember the inflexible door to door move policy because it was perceived individuals were abusing the 10 days of ILM? This I think is a similar, though fairer, crackdown, if one needs to happen.
All that said, it doesn't address the the underlying problem at the root of this, which I would predict is:
1) unaffordable housing markets in many CAF locations;
2) a lack of available RHUs;
3) an unwillingness to go unaccompanied or IR, based on family needs and current policy.
If we work on fixing these three items, perhaps it would fix the above issue in most circumstances.