There was a point a few years ago in my comic drawing 'career' that I gave myself a goal of drawing a thousand pages of comics before dying. At that point I had resuscitated my drawing habit to the point where that seemed quasi-realistic if not likely.

A few years after that I counted up what I had done (I'm counting false starts, unpublished/unsold & really old stuff, as long as it's a complete drawn sequential page) and came up with something in the mid-140s... and felt pretty good about it. A thousand didn't seem like that big of a number anymore.

Today I counted up again and came up with 255. That's just over 25 percent!
This 1000 thing may happen someday! I can do about a page a week, so I could conservatively see this happen within twenty years.