I am really looking forward to regions when it arrives! It would be great to have the ability to have services in each region routed closest to the user.

Example setup could be:

2 replicas in East US

2 replicas in Ireland

1 DB in East US

My assumption is you will have geolocation built into your load balancer service. I.e. Spanish user > Ireland (railway load balancer) > Ireland service

Also I assuming that you will have to run the same services in each region. I.e. NextJS app will have to be running in East US and another service will have to be running in Ireland.