Basically it's not over!
If you happen to spend your days on NG you'll barely notice a difference.
If you happen to spend your days elsewhere you might want to try Ruffle or SuperNova - or just click that link above to find ways to make Flash work just like it used to. No need for extraneous plugins... just a little configuration file replacement and/or other tricks.
Here's a nice read too. Somewhat relevant but mostly nostalgic.
Lettuce make sure Flash lives on forever now.