[IkmoIkmo]

I've got no clue how that's really meaningful in this case. I just mentioned there's a 1% interest government-insured savings account available, i.e. if the bank goes bankrupt, you still get your money. The only instance where you don't get your money is when the government goes bankrupt and doesn't honour its obligations. In that scenario, your mortgage debt would be even more screwed.

Meanwhile, getting 1% return on a 30 year mortgage puts you in a much safer, financially cushier position, than having had 0% returns for that period in time. Would you rather have 40k saved + 10k interest saved up in savings saved up in a government-insured savings account when you lose your job, or would you rather have a 40k lower mortgage debt and slightly lower payments or a lower time-to-payoff? Particularly given that mortgage payments can be furloughed and negotiated in times of payment difficulty. The answer is very clear. Choosing 0% returns over 1% returns in this case is the riskier choice.