It is not only this: moving datums around in the database heap is expensive (invalidating caches, exacerbating thrashing) and touchy (index pointers, concurrenc

It is not only this: moving datums around in the database heap is expensive (invalidating caches, exacerbating thrashing) and touchy (index pointers, concurrency considerations). But debloating over time is an important property, so it's probably worth it to eventually get it right.