I don’t see a downside or tax implications … if the money is just on cash in 401k and you only wouldve had pmi a year, you’re getting a guaranteed return on your money of the pmi paid minus any tax ded u woulda had. If pmi is no more u can pay back the Loan to the 401( in my case we had the cash on hand and in the acct but just wanted to do something w retirement $ other than 401k available shares. Allowedm
to keep cash in various commodity metal rugs and not feel pinched for a savings fund . The primary risk as I see it is not being able to pay off the loan in a pinch but minus that risk it looks smart for certain types…