Mortgages in Switzerland can still take on the literal meaning of the word(s), running for 50 or even 100 years with the debtor's pension fund placed as security.

FWIW the OP's cost of living figures in the video included in the linked article seem a little low or are assuming best case. Sure you can get health insurance cover at 250.- CHF a month but that will be at the highest franchise (i forget the English word) so if you do get sick it's going to cost you 2,500 CHF before the insurance kicks in.

1,200.- CHF a month seems low for Zürich, but also high for a single room with no kitchen. I'm paying a little more than that for 3.5 rooms with a kitchen, garage, cave, etc. No, I'm not in Zürich or Genève.

400.- CHF a month on food seems about right if you never eat out at all ever. And sure you can spend as little as 100.- CHF a month on travel, but you're in Switzerland - get out and see a bit of it, go snowboarding/skiing in the winter season.