Yes, I was on the core team between 2010-20#{hard-to-tell}. DataMapper was created by Sam Smoot and quickly taken over by Dan Kubb who did a crazy amount of work, practically rewriting it and introducing all the crucial features, and then maintained it for a couple of years with the help from a small group of people.

This is correct. It's probably hard to measure a person's total contribution to DataMapper because the gems are spread out across 20 to 30 repositories, not just dm-core.

I did maintain DM for a few years, but burnt out as there wasn't enough time to keep up with the community demands and work a full time job. There were a couple of years I effectively worked 40-60 hours a week on DM and only 5-10 on work; this wasn't tenable long term and burned me out.

The small dev team, of which solnic was a core member, are an amazing group and there's no way I could've maintained DM for even a fraction of the time I did without their support.

Fair cop; I only saw solnic's name on stuff when I was using it late in DataMapper's life.

yeah it's because I was contributing to many dm-* projects and handling a couple of last releases.