Rich text fields use a form of Markdown syntax. I use a script that converts Markdown to HTML for my clients. I usually have the script triggered from a button or as part of an automation script. Depending on what aspects of rich text you use and how they are created, this method is a little more robust than
REGEX_REPLACE. For example, a markdown converter script can handle reference link, as well as inline-links.
Is there any way to purchase/get access to that script? We don’t have the capacity to learn a scripting solution at the moment, but have lots of content written in Rich Text that won’t parse to our WordPress page unless we convert it to HTML first.