YMMV. If you are building a single page app for expert users in a domain, and editing an entity changes the visual context by going to a different page, that doesn't go down well in my experience. We tried it once, with multiple iterations, and in the end had to roll it back to modals because the complaints were endless.
I freakin love it when it goes to a different page with its own URL. Stakeholders/customers can just create a spreadsheet directly to the relevant link if they have a lot of things they are trying to track outside the software (think inventory management stuff).
