When Dumpcast started dumping, 2007 it was, we are talking about a dozen years ago now, things were different. We knew it was possible to dump with a PC drive (hackers like Yursoft demonstrated it as early as 2004), but it was very unreliable and only works on specific CD drive models you had to buy used, there were no special tools to correct offsets, no descrambling tools to dump the entire disc in audio mode (or else you would need to do multiple trap/swap discs), etc. etc. It was too much of a pain in the ass, not to mention I was a teenager with no money and couldn't afford to hunt down and test specific disc drives but everyone had a Dreamcast and could just get a BBA at $100 or at least settle for a cheap serial cable. Dreamcast SD card reader did not yet exist at this time. On top of that, we were not very well organized, there were lots of people willing to dump but with little technical expertise, and there were language barriers with Japanese dumpers who were just uploading dumps casually to Underground-Gamer to no standard and we needed to convince them to join with us and that meant making it as easy as possible to make it worth their time to dump those discs again. So we all quickly settled on doing it the Dreamcast way. Now with SD card readers going for $15 there is no reason people can't dump with that method. As for ECC/EDC, at the time there was no GDI format and so we communicated with NullDC developers who were adding the GDI format to their emulator. One of the NullDC developers believed that several later DC titles likely had copy protection schemes that relied on false/invalid ECC/EDC data or even modified subchannel data to deter pirates. There were PlayStation titles that did this. We had no way of knowing if that was true or a rumor, since dumps did not exist on the internet for us to check, not to mention there was no way to play GDIs on a real DC, and nullDC did not have good enough compatibility yet, and everything available online was old shitty scene rips with a bunch of bragging and no solid info on what sorts of copy protections had been broken. Some even advocated for full subchannel dumping. But that made dumping substantially longer. In the end we settled on just dumps with ECC/EDC. It was easy to dump, it was still fast, and anyone could always remove the data if they wanted, and it gave us insurance that we wouldn't have to go back and dump everything again if the ECC/EDC was used in a copy protection scheme. You are right though. 12 years later and we have never seen evidence that the ECC/EDC was ever part of a copy protection scheme. So all dumps are about 10%+ larger than they need to be. But a simple script will remove all the ECC/EDC so I just do that before I export my games to an SD card.