Squashing gets you in the habit of force pushing, and force pushing greatly increases the risk of clobbering someone's work. I've seen a lot more hours wasted on lost commits than I find credible to be wasted in slightly more verbose history.

Squashing also turns cherry picked commits into merge conflicts.

I'm not a fan. I can always go back to the feature PR and read the ticket details and diff commentary when I want the history with a full diff. And of course very old history isn't very relevant because less of it remains in the present, so rot of ancillary systems isn't a huge concern.