[senko]

That's nice, but "no reason" is often a high bar.

There's often a good reason to keep the data (marketing, product, etc), which when weighted against the potential liability, usually wins.

[brookst]

"often" and "usually" are doing a lot of work there.

In my experience, in my role, we often forego collection of this data because there usually isn't an obvious upside that makes it worth it. If nothing else it's a ton more privacy and security reviews.