And so, such tools sort of have a critical massI like to think APEX has a large population - that is every growing - helping out too. Look at this forum, their are people helping out every day.
Another concern is would the plugin code "survive" an Apex upgrade. I would hate to upgrade, say, from 4.0.2 to 4.1 and find that my previously installed plugins had disappeared.Of course, I'm not an Oracle employee, so can't speak for there future. But i'd be quite surprised if they didn't make the upgrade path for plugins as seamless as possible, in the event they had some core changes.