We should celebrate; celebrate what we've become and what, hopefully, we will become in the future. I agree with the article on "... looking forward."
We have evolved and continue to evolve, hopefully for the better. How many of us could look back and state there would be things that, if we could do over, we would; that we honestly don't have any regrets? Could I have been a better person; could I have done things differently? I'm sure most of us would say "yes".
As a country, Canada is the same. Regrets are many and there are still things that need to be corrected but with goodwill and tenacity, it will be done, (as long as we can get rid of Political Correctness LOL)
Canada is a Work in Progress but if we keep looking backwards, we won't be successful in becoming an even better country than we are now.
JMHO