I know of exactly
one (just the one!) IF that has actually successfully done a rewrite/rework without going into limbo (I believe as of Sept. the rewrite, which started around end of May, has gotten mostly up to par with the old version too); and that is
Bride of Shadows which is not going to be everybody's cup of tea (nsfw, dark romance, fem!locked mc, and a huge pregnancy + religion focus) but is a good example of a writer actually sitting down and locking in to write the story they wanted to write even if they had to redo it a time or two in the process. Like a lot,
a lot, of these IF writers could learn a thing or two about discipline from this lady.
But it's kinda sad that a relatively newer IF is the only example I can think of off the top of my head to actually do this successfully (oh actually Arcadie: Second Born probably fits too but that was more an engine switch than a straight up rewrite/rework).