Oh boy, this is something I’ve pushed back on for years, working in client services. It’s part and parcel of working in that world. My rule of thumb is give users choice almost always, but here are a couple of contexts where I would recommend links get a target="_blank" added to them:
- If there’s audio or video playing on the page, you don’t want that to be disrupted with an accidental link click
- If the user is in some form of onboarding or purchase flow, you’re already dealing with fine margins, so links opening in new tabs mitigates drop-off risk
Jason is looking for data though which the above definitely isn’t. If you have data, you should definitely share it with them!