Reviews, pay stubs and other personal information can end up on it and I don't trust Cisco so I did everything I could to wipe the drive before returning it. Everything that was Cisco's was checked in to relevant repositories managed and backed up by Cisco before the wipe.
For me, it's not a trust issue, it's a human error issue. Especially during a mass LR where hundreds of people are turning in their laptops on the same day at a site, and each site is then sending all of these laptops to the Asset Team where it's now thousands of laptops that have to be sanitized. It's just too easy to think a laptop has been purged when it hasn't.
In years past, I was sort of the "go to" person for my team when they had a refresh. Once they'd transferred all their data from the old laptop to the new one, they'd give it to me to do a DBAN (HDD days) or a low-level format or secure erase (SSD days) of the drives and re-image them to the basic "Cisco" image.
When someone who worked remote (pre-pandemic days) on our team quit, he shipped back his laptop and our manager had me pack it up & ship it back to the US Asset Team in SJC. Turns out, when they received it, it was not his current laptop, but the previous one. Apparently he failed to return the old laptop during his refresh while on another team so our manager didn't know he'd kept one. They reported him to HR who contacted him to try to get the newer laptop back, and when they didn't, they filed a police report for stolen property against that ex-employee. Yes, the BU had to pay for that laptop and the previous BU apparently paid for the older laptop, but he got "dinged" for stealing from the company when he kept the new one. Not sure how badly that impacted him, but it's there for a background check in the future to find.