I think this is only true in markets that are have increasing populations, and especially in BC where easily buildable land is rare, or in southern ontario where easily commutable vacant land is running out.I'm not so sure I agree with those who recommend selling. In Canada house prices have literally taken off. If you were out of the market for any length of time you probably can't afford to get back in. In this area a crappy house might be $1,000,000 (has about doubled in the last 7 years). A nicer house would be at least $1,400,000. Something really nice, with a view, might be $4,000,000 or even more.
Taxes on our $1,400,000 2400 sq foot home, in a nice area, without a view would be in the range of $4,000/year.
Rental property is practically non existent and rents are very high, in the range of $2500 - $3,000 for a small home or apartment. And that's probably not high enough to justify buying or building property to rent.
Owning your own home at least gives you some degree of cost control and an asset that can be sold eventually (or you could mortgage or take out a reverse mortgage on it) if as a retiree you ever run out of money.
We plan to keep our house, pay someone to provide maintenance if/when we can't do it ourselves anymore, and live here as long as possible.
The U.S. has more areas with declining populations and more areas to move to with different tax structures.
Both countries have reduced immigration so we'll see how real estate is valued in the next few years.