I think I didn't look at it initially because it was too close to bash, and then by the time I burned out on fully reimagined shells I fell back to zsh which was the shell I knew supported post-command hooks. Definitely not a final decision, but it might be a while before I try new shells again...
Nine Reasons to Use OSH - https://oils.pub/osh.html - it runs existing shell scripts, ...
What is YSH? - https://oils.pub/ysh.html - It's the ultimate glue language, like shell + Python + JSON + YAML, seamlessly put together