I didn't do a PhD, I was accepted to one though, but I turned it down last minute. If you plan to go back to the industry after, it can be at very least a waste

I didn't do a PhD, I was accepted to one though, but I turned it down last minute. If you plan to go back to the industry after, it can be at very least a waste of time. Don't do a PhD 'for the fun', it's not.