I really didn’t get offended. And I totally agree with you. If there is some kind of last update date or Compatible Ghost version indication in Ghost marketplace then it will be more helpful to users.
But then as Ghost marketplace only list themes. and redirect to live demo or download site, the information should be in those sites.
In WordPress there are also lots of backdated themes. People just ignore those and choose to use new themes.
We all ghost user ( you as an user or me as an theme developer) here are trying go make ghost ecosystem better. We should speak and discuss about our good and bad experience here. There is no question of shame or offend. we are growing together.
Have a very good day.
Cheers!! 