[feanaro]

> Even if I'm not using bisect (I rarely do), having the 'git log' be polluted by merges makes it harder for me to fit everything into my head.

How and why? Done properly, a merge commit of a PR breach is semantically equivalent to a squashed PR commit, from the perspective of the "trunk"/main/master branch. It is the commit introducing all of the changes of the PR branch into the trunk branch.

If you're about to reason about squashed PR commits, you should be able to reason about merge commits. The only difference is that with merge commits you still have the individual commit granularity available, should you be interested in it.