When they say 30 year fixed, do they mean fixed term, or fixed rate?
These mortgages are good for people who believe they will sell their home within the time interval or, occasionally, the person who believes they will be able to refinance their mortgage.
However, as prior to 2022, mortgage rates were super low and an ARM offered little advantage against a market where you could get a 2.25% 30yr fixed, the became slightly less common the last few years.
In 2008 these companies were “too big to fail”, which I think might’ve contributed to some sort of a short term economic hiccup. /s
Maybe a better way to say it, is every mortgage in Canada is what Americans would call an ARM.