The cold war was a multi-decade existential threat to the global world order, and indeed life as people knew it. With the exception of downstream implications from Russia/Ukraine -none of the events listed compare to prospect of WW3 that the cold war offered, none had direct major direct implications for Canadian sovereignty or our way of life. They were fundamentally different time periods, and our defense spend reflected that. Both were too low.
Our spending waxed and waned through those cold war decades, but we maintained a significantly larger and more capable (relative to the time period) force. We put out multiple classes of destroyers, and the industry was left in a position to bring a world class frigate in the Halifax. We operated multiple fleets of fighters, some of which were license built in Canada. The low water mark was 1.7% GDP, and much of it was spent above 2. Since 95 the average has been like 1.2, with a high water mark of 1.4.
You can't "Dude" your into implying that Canada didn't treat defense differently through the cold war vs after.
I don't expect anything to change with respect to attitudes, I expect a repeat of history where we see a grudgingly increased spend (probably still not high enough) in reaction to the geopolitical requirements of the time. That increase requires an absolute shit tonne of money be spent.
It wholly depends on whether this is a blip or if we've entered into another cold war esque period. Global/European sentiment tends toward the latter, but only time will tell.