Up in Alberta I don't see recessed lights being sold in big box stores
any more. There are certainly no such lights in the newer (10yr)
houses I've been to.

Theyre still using the can/pot lights in new homes. We have about 20 in our
new place but they're more stylish than the old 7-8" ers.

I remember news reports from something like 15
years ago where there were a number of house fires due to heat
build-up in the ceiling insulation over the recessed pots due to
improper installation

There are ordinary (cheap) can lights for uninsulated ceilings. They're easy
to throw in.

For insulated ceiling can lights, they are more expensive and have to be
installed more carefully. There are also thin clear plastic boxes that act
as a vapor barrier that go over the can and help to keep the insulation off
the box. These cans have also have an overheat sensor in them to shut
themselves down if they begin to get too hot. I'd suggest that if the OP
doesn't know how to put them in to code, to let a pro do it.

Rudy