It depends how you measure it. 5 or 6 measures strictly as full-time in the specific discipline of frontend development, closer to 10 in general software dev with varying time commitments
Would you object to a graduated tax that gets applied to your existing mortgages in addition to an outright ban on new purchases of secondary properties within the metro area? I'd be fine with it.
I don't any reason why we shouldn't do that. It discourages people in your position from hanging on to multiple residences, and it levels the playing field a bit, at least until some equilibrium is reached in which existing and incoming demand approximate the available stock and pace of development.
Better Dwelling paints a bleaker picture when you isolate certain relevant categories of homes
For example, in BC (as of 2020), 9% of new condos (built after 2016) were owned by foreign interests, which is down from 2019, but probably holds steady for a number of years.
It looks pretty great, I hope to try it more extensively in the future. I was somewhat surprised how intensely I was overcome with existential dread as I put in my information, and just left. It's hard to approach thinking at all about finances, being some years into a pretty volatile career and having basically no assets, investments, savings of any kind, debt, and very rapidly rising costs.