[stocksthatgoup]

The guy that thought 640K would be plenty now thinks something is going to be obsolete? Hey Bill, what about Bob?

You must have a typo. My Tandy with TRSDOS has 64K RAM

[discostu]

No typo. The problem became that DOS was not designed to address more than 640K of memory, the decision was made that 640K (10 times what anything but the most impressive system had at the time) should carry them for a long time, which it didn't, which forced them to add extended memory support which was a nasty kludge that caused memory management (moving stuff from main memory to extended so you'd have enough free main to play Doom) to become an important skill set for power users.