Most people think of websites when discussing domains. But the more personal, important, and perhaps valuable dimensions are the accompanying email addresses.
Corporate communications are increasingly electronic. A poor web address may be largely ignored owing to links & display of corporate name. But the email stands alone.
A lousy second-tier email address using .pop or .xyz is blatantly unprofessional. Moreover, this is a personal link to each employee, so weakness & embarrassment are magnified repeatedly. It can be money well-spent paying a few tens of thousands of dollars to purchase the .com -- while available, if available at all.
Short powerful .com domains remain best.