Is it time to create a 0.29.x branch and a prepare a 0.29.0 release?
I think the 0.28.x branch was created in 2023:
git merge-base Exiv2/0.28.x Exiv2/main: c86ae6acf597304db37246434ebc393d732c22c2
A lot of the discussion about starting the 0.28 series happened here: #2406