We would like to be able to understand how an artifact has changed between one date and another, without having to follow all of the changes in between (aka follow the string of follow-ups).

We are able to get close with:

curl -X 'GET' 'https://tuleap.pcc.com/api/artifacts/24097/changesets?fields=all&limit=10&order=asc' -H 'accept: application/json' | jq '.[]|{"last_modified_date", "values": .values|map(select(.label=="Requirements and UI"))}'

But that isn't really ideal for the average user.