For casual usage like personal blogs and whatnot? Sure, use whatever.
But if I was starting a web-based business and couldn't afford the .com? I'd rename the company before I'd use .xyz - if your business takes off the squatters will notice and raise their prices, so the .com will never be cheaper.
If you got an "urgent e-mail" saying your employer needed you to confirm you're legally allowed to work, and they directed you to experianrtw.app - would you go there and send them a photo of your passport?