The disbandments have also caused heartache, but in the end, the Army didn't lose much at the time (tradition notwithstanding).
The Canadian Airborne Regiment was actually added to the order of battle as the other regiments were disbanding. But bear in mind that as the Cdn Guards, QOR and RHR were disbanding, other battalions of the RCR, PPCLI and R22eR were standing up.
Our regiment just ordered 10 new hair sporrans, of the type issued to corporals (of which we have many). They are 500 dollars apiece. The regiment has 250 glengarries on issue currently to all ranks, at 90 dollars a pop. Keeping two battalions of a regular force Highland Regiment outfitted with kilt, hair sporran, purse sporran, hosetops, glengarry, special tailoring on DEU tunics...our ex-Black Watch finance officer rolled his eyes as he saw the invoice and simply said, not two nights ago "Now you know why they disbanded the Watch."
I am aware of the conspiracy theories about killing ties to Britain and the Americanization of our army, etc. Some of it makes sense, but the Watch still lives on in Montreal - where it belongs, some might say - and the Queen's Own are firmly at home in Toronto. They always had Militia battalions throughout the brief Reg Force flirtations brought about by Guy Simonds. Ditto the Fort Garries.
Don't know what to say about 4RCHA - didn't they go to the SSF in some guise?
Overall, it wasn't as large a travesty as it is sometimes painted. Vietnam shook the United States, and by extension Canada. Its too bad; I think the Cold War was a great victory, and it was won partly in Vietnam, and partly on the North German Plain. But it smashed the traditions of two great armies - the US and the Canadian - both of which are still recovering in many ways. But whether 3 RCR is called that or 2 Black Watch seems beside the point.