It is curious supporters would make a blanket claim about the quality of plans being dropped, a claim without subtlety and nuance, when it is exactly that lack of specificity that has put the broken pledge of "read my lips you can keep your plan" in such focus. The idea that ALL plans impacting 26 million people are junk is absurd on its face and there is no evidence presented ALL, or the majority, or even some, of those plans are junk.
The claim that losing your plan only applies to a small segment of the population is more troubling. There is plenty of evidence from HHS and CBO that many in the employer-based market will lose there plan. For instance, here is the CBO in May of 2013 estimating 7 million will lose employer based coverage by 2018 and 5 million total in the non-group market by 2017. That's a lot of junk plans.
Casey Mulligan thinks the estimates are too low. He thinks the number can be 20+ million, driven by the incentives written into the law. Employers have an incentive to drop coverage and employees will have an incentive to allow their coverage to be dropped. He concludes:
Moreover, this is not an issue of the adequacy of the group coverage that's lost, it simply that the ACA induces market participants to tolerate coverage loses in order to, at taxpayer expense, reduce the monetary loses they experience as a consequence of the law.
Losing your health insurance is a feature of the ACA. The ACA was designed to kick people off their plans. This is not a surprise to many who have opposed this plan from the start.