I am setting up a WordPress multisite with numerous subsites. Some of these subsites will have a custom domain. I may end up switching hosting providers down the road and want to avoid having to get my clients to switch their records when I do so.
Is there a way to set up the DNS flow so that it is:
Client's DNS A Record > Redirection controlled by me > final server
Client's DNS A Record > final server
Would this be too slow?