I’m not really a MUSHer, or at least I wouldn’t describe myself that way, but I do consider myself a part of “this hobby”. I would more broadly consider myself a text-gamer or a MU*er. I’m making that distinction since the OP focuses mostly on MUSH history. I’ve played MUSH and happily would again, but it’s not the main kind of text-game I play.
So with that perspective in mind, I don’t think this hobby will ever really be consigned to the annals of history, because I think that text-games scratch a very specific itch that no amount of graphics can ever fully replace. They used to be more popular before graphical games took over, but the people who still play them now are those who actually always liked the genre just for what it was, not simply because it was all we had available.
What may happen (and has already been happening for a very long time) is that it evolves, and I think that’s fine, and good, and not a tragedy. It’s why I don’t really call myself a MUSHer. There are many other kinds of games that fulfil the same function that MUSHes do.
In terms of preserving history, I think that what would interest me most would be any kind of effort to try and trace the history of that exact evolution. From the first game that called itself a MUD, to the first game that called itself a MUSH; to authors and academics who’ve tried to write about the hobby in various ways, to varying degrees of success; all the major forums and websites and chat servers where fans of the hobby have congregated, even major schisms like the the MSB/BMD split; various controversies over the years like MUDs with exploitative business models, plagiarism and copyright allegations, child-safety concerns, GenAI, attitudes towards played-bys, art commissions, accessibility awareness; PvE vs PvP perspectives, and other game design philosophies; MU* taxonomy, clients, engines, and ways the genre has shifted over time from exclusively text-based to incorporating graphics.
I think this would be beneficial because despite how fractured the hobby is, it’s a lot larger, historied, and interconnected than many people realise. MUSH players could benefit from learning more about alternative mediums like RP-focused MUDs, and vice versa. There’s so much multi-directional influence that many people, including myself, aren’t aware of. (I literally don’t know what a MOO or MUCK is.) Maybe an effort to catalogue that kind of history could encourage more cross-pollination, and invigorate the hobby.
The day-to-day stories that were lost, I personally care less about. Books are infinite, stories are infinite, but maybe this thread has inspired me to think more about ways the history of the medium itself could be preserved.
As for the last question, I’ll be honest: I’ve definitely spent more time in specific corners of this hobby than was beneficial or healthy for me, but I don’t regret my participation altogether, and will continue to participate.