Nothing ships until it has been seen on a clone of your site
A staging clone gets the new Divi, the child theme, every third-party module and the plugins, and then the assigned templates and your busiest pages are opened and read at three widths. Only after that does the live site get touched. The reason this is stated first is that it is the entire product: every other line below is a detail of how that check is carried out. Pushing a builder release to production and finding out from a customer is a decision, however rarely anybody words it that way.
Theme Builder templates are checked, not just pages
A page can look perfect while the global header above it has shifted, because they are separate templates assigned across the site. So the check list is templates first and pages second: every assigned header, footer and body template gets looked at after an update, not a sample of pages that happen to share one. This is the single biggest difference between checking a Divi site and checking an ordinary WordPress one, and it is the step most often skipped.
Your Elegant Themes account is checked against the site, not assumed
Divi can only fetch a release while a valid account is connected, and a great many Divi sites are running with the username and API key of somebody who left the business. Owning a lifetime licence is not the same as having it authenticated on this install — we verify the connection actually works by looking for the update to appear, not by looking at a receipt. Where the account belongs to a former agency we will say so plainly, because that is a commercial problem rather than a technical one and it is yours to decide how to resolve.
Divi's own performance switches are re-checked after every release
Dynamic CSS, dynamic module loading, deferred jQuery and the static file cache all live in Divi's own settings, and a release can reset one or leave it fighting whatever caching plugin you run. The symptom people report is never "a setting changed" — it is a page that looks stale, or looks right in the builder and wrong to visitors. So the switches are part of the post-update pass rather than something configured once at handover and never opened again.
Third-party modules are what usually break, so they are inventoried
Stock Divi rarely breaks itself. What breaks is the module plugin somebody bought in 2021 whose author has moved on, and you will not know which one until a page stops rendering. So the site starts with a written inventory: every third-party module, its version, its author, and when it was last updated. That list is what makes an update a decision rather than a gamble, and it is the first thing to consult when Divi 5 comes up.
Divi 5 is handled as a project, not an update
It will appear in your updates list looking like any other version. It is not one. Your maintenance plan covers watching for it, telling you it is there, and keeping you safely on a supported Divi 4 until you are ready — it does not quietly migrate you because an update was available. When you do want to move, it is scoped, staged and quoted like the project it is.
The Role Editor decides who can reach what, and it is worth setting
Divi ships a Role Editor that almost nobody configures, so every editor on the site can open the Theme Builder and change a global template. Locking that down while leaving page editing wide open is twenty minutes of work and removes the most common way a Divi site gets broken by its own team — not carelessness, just somebody opening the nearest thing that looked editable. Your people keep editing pages; the site-wide furniture stops being one click away.
What it costs and what arrives each month
Care starts at $159/mo and covers staged updates, pre-update backups, template checks, monitoring and the licence watch above. If you also want development time in the same arrangement, $700/mo includes five hours a month and $1,300/mo includes ten. Work outside a plan is $165 an hour, or $750 for a prepaid five-hour block. Each month you get a note of what was updated, what was checked and anything needing attention. No lock-in on any of it.