What is the upgrade process like for existing applications built on the Electron framework? Is it well documented and a first consideration or are you thrown to the wind? Will 4 be able to move to 5 or are we talking about rewrites?
If you are just using Electron "off the shelf" to host your web app it's generally `npm install` the updated binary, test, and deploy.
Sometimes an Electron-only API changes, but that's pretty rare and most of them aren't "mission critical" if they break. That's always documented well in the release notes and the API and Electron for the most part seems to follow a "deprecate for a version ahead" pattern that you should have plenty of warning.
If you are using native libraries is where things get complicated. At that point you are likely building your own Electron binary, and need to find updated versions of your libraries that support the upgrade NodeJS and/or Chromium versions. Most of that is the same documentation whether or not Electron was in the project, check the related documentation for the appropriate NodeJS and/or Chromium versions, rebuild as needed using the usual tools.
