> In Wordpress, the site name is baked in all over the place — in config, in database, in generated stylesheets and so on. In theory, this should not be like this (if you use barebones install w/o plugins), but then you buy a theme or some less-than-perfect plugin and boom, you need a separate plugin just to handle migration (which may or may not work 100% of the time).
Wordpress store some information fields and the length of the string of those fields. Use a plugin that search and replace for those and recalculate the length.
Also, wpmigrate-db has wp-cli commands to export the database, I don't know if wp-cli search-replace can do that.
Edit: And it does:
[--export[=<file>]]
Write transformed data as SQL file instead of saving replacements to the database. If <file> is not supplied, will output to STDOUT.
Well, wpmigrate-db allows to replace multiple strings in one command and that's something wp-cli default search-replace doesn't provide.
WP-CLI is your friend: