When looking at the latest pics and vids she was nearly that huge and limited to some activities.
One reason for her retirement beside the health issues might be the fact that these string implants kept growing in her case and she won't drive regularly a huge distance to have them drained.
So if I remember correctly not every doc would be able to do this draining.
And by each growing and draining her skin was slowly but steady stretched and kept getting bigger and bigger.
There are indeed many issues, however, if I understand it correctly, the implants themselves didn't expand, the fluid surround them just increased, causing breast expansion. As far as the draining goes, it is really quite simplistic; a 20g needle, IV tubing with a valve, and a vacuum bottle. From thoracentesis to paracentesis, I have assisted physicians with this dozens of times.
But as I see it, the problems may included the way the weight may have been compromising the underboob tissues because there was no support built in, the way her breasts may have rested uncomfortably against her lower ribcage and diaphragm, and the increasing need for and resulting should pain from garments trying to lift and support all the weight. I saw no simple solutions and Foxy has come to that realization in wanting to incorporate lift and support when getting bigger expanders.
The bottom line is although Chelsea achieved some degree of fame and fortune having such huge breasts, I think she was conflicted and found huge breasts annoying to live with 24/7. She never did develop a love for actually having huge breasts nor embrace the way they influenced her private life. I'm sure she enjoyed the opportunities to showing off, but those moments are a really small part of any month. Perhaps, had she known her breasts would get so huge, she may have welcomed a internal bra for support, though I don't think they were approved at that time. But perhaps, had she known that her breasts would get so huge, she may not have gone with string implants.
I'm sure she could write a book on these speculations and her life with huge boobs. One thing for sure, she showed other girls that they too could live with enormous boobs; it is just a matter of finding that manufacturer and good planning that has held a number of girls from surpassing Chelsea's size.