Switching to a new theme for a large site

I’m changing the theme of a WordPress.com site that has more than 1,100 pages. Any tips or words of wisdom for updating a site this large?

I’ve already run into issues once with being unable to get changes to save and I was wondering if it was an issue with the theme (sent in support ticket with the developer and waiting to hear back) or the number of pages. I ended up restoring the site to a backup while I figure this out.


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