I look forward to seeing them someday. I keep a stash of Canadian
currency for use when I travel there so at some point I will probably
need to go and exchange the old bills for new ones. Otherwise I might
get another cross-eyed look like I did when I used an old CAD$10 "Bird
of Canada" series bill to pay for something. The "Canadian Journey"
bills were already well established and the cashier was reluctant to
accept it (but finally did).
Also I find the Canadian paper not as durable as the United States
paper. I had Canadian bill in hand one time while waiting to pay for
something and I tugged on the ends as I have often done with paper
money. The bill split in half! Luckily the cashier accepted it and
even had tape next to the register to tape it back together again.