I think this a good three step procedure. I would expect the expectations from 1 vary from person to person. For example, I probably tend to delete a lot more stuff than the average developer. I see storing data without a plan to delete it as bad practice.
For example: Mastodon seems to store public posts forever. I guess forever is a bit stark, for at least 2 months. That’s at about 10 times as long as I find reasonable. I think it would be good to have a professional survey on what people think 1 should be.
Maybe I’ll contact the people behind Mastodon: Research Symposium and Tool Exploration Workshop