Git history is a bit annoying to navigate, but that may just be a tooling issue. I've long been bothered by the loss of the review history when merging a PR. Would actually be pretty cool to click on a row of code and see the commit messages that formed that row of code in a little sidebar, and the technical discussions that were behind it.

Functional safety development processes often demand code-review, technical design decisions, changes of plans, or intentional compromises; to be linked together with reference IDs in the code they effect. But the workflow for this is usually extremely manual and absolute misery. But a codebase made like this is like magic to read later.