As time goes on, and as I see more and more apps simply disappear off the face of the Earth when developers deem them no longer worthy of their time, I find myself switching over to software that's either backed by large corporations or open sourced, regardless of how clunky it might be compared to "designer" alternatives. My hope is that we soon find a way to collectively monetize the latter. It's simply awful that an app can just "pop" and take so many years of developer and user time with it.
(None of the above is meant to blame Vesper or even comment on the sustainability of the app economy. It's just my sad reaction as a user and, um, app enthusiast. And props to Gruber for the introspective and humble post-mortem.)
[1]: http://beta-blog.archagon.net/2016/08/21/tool-reliance/