Well said. I was just going to say: "If I have to explain it, why bother."
We all have our reasons. In my case, "because it's there" probably sums up my feelings best. Whether it was just Steve Jobs' "reality distortion field" or not, I really believe that 128K was fine for most people at the time and that there was nothing software could not do utilizing the hardware resources at hand.
JDW, as do I, would like to see the holy grail of SCSI implemented on the 64K ROM, in no small part so that we can run them with modern flash drives, rather than noisy external (or internal) options.
Thank God! Here's an example of software that won't run on MORE RAM. One of the reasons I wanted to preserve the 128K intact was for just this issue. Some software was written for only 128K and did not know what to do with 512K even. Although I am still hard-pressed to name a specific application, I at least remember having the issue come up. Megaroids is clearly a related issue.
One other thing to consider as well: The 64K ROMs and 128K ROMs work differently and ROM patches are implemented differently for each. Despite Apple's efforts to make them fully retro-actively compatible, they weren't and some old software just didn't run correctly on the 128K ROMs and some System versions.
Finally, not everyone is interested in bigger, better, faster, more powerful, like QUADRA-man. His screen name says it all! ;-)