And that's an important aspect that engineers need to take into account: serviceability. We already kinda do this for our own sake, we do need to onboard develo

And that's an important aspect that engineers need to take into account: serviceability. We already kinda do this for our own sake, we do need to onboard developers and change functionality over time after all. But there's an art to designing a complex system that is nonetheless scrutible and modifiable. There have been experiments in designing such decoupled and live-modifiable systems, like smalltalk images and lisp machines, but the closest thing we have to that in broad use is the web browser, with its inspection window and console. Of course, webpages are usually deployed as compiled blobs of script these days, but without an isane amount of effort one could build a webapp that was well-suited to modification. Then the user agent would just need some way to save user modifications and apply them consistently. Basically like low-friction userscripts or extensions.