Another way to visualize it is to view each decade as a chapter. Say that you live to 80, so you have 8 chapters. So if you are 40, half of your book is done.
> Do you think it's valuable to zoom in and out of timescales for a tool like this?
Years back I did a zooming prototype that went from dots as seconds like [1], through days like [2], up to dots as billion years, with customizable grouping/layout. IIRC, when zooming out, it was kind of fun to see the highlighting of your life contract to a pixel or two and fade out. If personal information were available, zooming could interestingly trade off aggregation vs detail, as with zooming maps. But without it... don't know.
Thanks. :) The dot per second page? Yeah, ancient 2001 pre-canvas kludgery. Javascript handles short-term updates, and the server refreshes the page periodically, to limit the number of images ancient browsers needed to deal with. No repo. Nothing one would write today.
