My 401k is below what it should be for my age but, I have my Air National Guard pension (which I start collecting at age 60), my disability pension (now), my work pension. social security and hopefully a modest 401k amount in 15-20 years. My mortgage should be paid off by age 64, hopefully sooner if I can make extra payments.
Also I will get full medical from FEHB or Tricare when I reach age 60.
If you can manage it, you may barrow from your 401k. that money could be used to payoff the balance of your mortgage. Than you repay the amount barrowed to your 401k with interest. Instead of paying off a mortgage to the bank, you pay it off to yourself, the interest that you would be paying the bank now goes into your 401K.