This person has been blogging for 10 years. How long has Medium been around? How long will they continue to blog? How long will Medium continue to be around?

My blog is quiescent right now (I discovered I'm an essayist rather than a "blogger"), but it goes back to 2000, albeit quite messily from the first platform conversion I did. No platform has been around that long. Goodness knows the platform where it started is long gone and forgotten by almost everyone.