Stamos is urging Adobe to set an end-of-life date for Flash and to let browser makers rollout killbits on the same day so the whole ecosystem can be put to rest. This shouldn't happen overnight but an EOL date 18 months from now sounds like a good idea:
"It is time for Adobe to announce the end-of-life date for Flash and to ask the browsers to set killbits on the same day," he said in one tweet. He followed up in another tweet, adding: "Even if 18 months from now, one set date is the only way to disentangle the dependencies and upgrade the whole ecosystem at once."
There are a number of alternatives to Flash, like HTML5, which many are adopting. But it's clear by looking at the threat landscape that the harm caused by some Flash exploits significantly outweighs the platform's benefits, and have done for some time.