Removing support doesn't mean it will stop working. Adobe will stop updating and distributing Flash, but the game will continue to work as is.
I guess it depends on when browsers by default stop supporting it.
It doesn't look good.
2019:
- Internet Explorer removes support for Flash
- Firefox removes removes support for Flash by default, except for users with Firefox Extended Support Release
2020:
- Adobe stops distributing Flash
- Chrome removes support for Flash
- Firefox removes support for Flash
We're on the cusp of 2018, which means there's only really a year and a bit to either
a) reimplement the game in HTML5 or some other standard, or
b) start grieving its end-of-life and look back fondly on the good times