I would also note that, from an end-user perspective if we're talking about ISP services to customers on both ends here, you may run into geolocation issues where some geolocation providers decide that many/all of your users are in one location or the other, creating problems for them both with performance when they are misdirected to the wrong frontend servers, as well as in terms of convenience if they are being served content in the wrong location, or service issues related to access to streaming services, etc.