I'm currently working on a site that has hundreds of indexed pages, and we want to change the site to a new theme.
Rather than going through and updating every single one of these pages, is it possible for us to do a slow rollout, wherein only some of the pages are from the new Wordpress install, and the rest of the pages are from the old install? Is this a bad idea? Why / why not? Are there good resources online for this sort of thing? I didn't seem to find what I was looking for doing a few different Google searches. Thank you!
So for instance, I want to serve
from one wordpress install, and
from another Wordpress install.
My understanding is that multisite is not a good solution for this, or is it?