yes, we max out the HSA and save it, it will be used to bridge the couple/few years we retire before mediscare kicks in.
or, cash flow the premiums during that gap and just let the HSA ride, you're simply not going to get that kind of growth any other way & you're going to be taxed either way because as far as I know you can't pay health insurance premiums with HSA funds, or at least the premiums don't qualify for the zero tax withdraws from the HSA, at a certain age they do permit withdraws for any purpose without penalty so it becomes akin to a traditional IRA, not sure if that's 59 1/2 or 65, regardless it's ideal to let it ride - some Medicare premiums can be paid from HSA, can't recall if it's Part D or an Advantage Plan, I need to brush up on all of that at some point when it becomes relevant.
Also if you're both retired but not yet 65 your premiums should go down under the ACA, so it may not be as bad as you think.
By the way I misspoke above, I actually already had a high deductible plan prior to 2014 for many of the same cost reasons, I think the difference was when the ACA kicked in the deductible also tripled along with the premium. Prior to 2014 my 'high deductible' was somewhere in the $2000 range, maybe $2,500, it surged to $7,000 overnight. Bastards.