My organization has used spusa.org for 25 years, which I’ve always thought was silly because the Socialist Party USA has that acronym locked up in Google search results. So we’ve purchased several new domains, and I’ll be pointing them all at the same two sites (one Backdrop and one D8, at different subdomains per domain, i.e. www.spusa.org and community.spusa.org). All the dev is on spusa.org; are there any base URL gotchas I need to worry about?
It would also be nifty to respond differently to each domain; I might want to give each different home pages and themes. Where to for these?