Your reference would only be true if we could actually catalog, index, reference, retain, and absorb all there is to know about the physical world into a model

Your reference would only be true if we could actually catalog, index, reference, retain, and absorb all there is to know about the physical world into a model so simple we can still comrehend it. That's... unlikely. More likely is that progress, discovery, and improvement behave more like dispersing bits of fog in an intractably large cloud that's always creeping back in on the clearings your made previously. You can sustain positive progress but its asymptotic at best and there are always regressions eating away at what you've done in the past. So don't worry, there's always going to be more kinds of work to do, just like there's always going to be more physics to study.