Flash is hardly the only tech to have become obsolete. Anyone who has been around this industry more than a decade can list off multiple technologies we don't work with anymore.
The article was right that ongoing learning is the key. And while formal higher education is not for everyone, it does well at teaching people new techniques for learning and research. It isn't the only path, especially in today's reality. Its current failings are one reason that bootcamps exist...
But the idea that people are going to let their skills stagnate for 8 years, then return to a bootcamp to get the latest tech... Sorry, but that is simply absurd.