Hello, I am the young blood in that quote! I don't really know if there's any universal way to get new people into here. The only reason I stumbled upon it is I was adjacent to someone in a WoD game I joined on Roll20 who also MUSHed, brought it up once, and I took it on myself to peek into it.
Obviously the first attempt didn't go so well -- I joined Fallcoast and just got sort of drowned in everything all at once, and it was pretty overwhelming, especially as someone who didn't even really know World of Darkness all that well. I sort of inched away until I didn't even open my MUSH client anymore. I decided recently, not even a month ago, really, to give it another shot. FC looks all but dead now, though, and it's hard finding something that really seems that enthralling for someone like me who's got pretty narrow interests setting-wise, but I'm giving City of Hope and this one Star Wars MU a shot to try and see if I stick with it this time around. There's a humongous barrier to entry, honestly. Beyond the archaic sorts of commands and clients, there's just /a lot/ that needs to be read into and learned the hard way, it feels like, unless you basically sit down and have an MU study session.
There's also the inherent expectation of like Wiki participation and set-up and dealing with that code too, on top of everything else, that sort of leaves things feeling incomplete if you just ignore it and try to keep things in-client. I can't remember if I saw it mentioned when I learned about Ares the other day, but the idea of a +profile (@profile, profile, etc) command that elaborates on the snippets included on +finger sorts of deals might be a good idea! I don't know if there's anywhere that does that already or if I've just been missing things, but that's just a note from a literally infant.
All of it might just sort of feel like, idk, standard from the perspective of people who have been doing this forever, but compared to things like Roll20 or other VTT and Discord, there's not a lot of output for the amount of input, unless you're directly interested in the sort of roleplaying and community that you can find in a MU.
TL;DR - I just got into it out of boredom and friends already being invested in the hobby
Edit 2: I've also been looking a lot at Ares, because I want to take up the Golden Rule of being the MU I want to see in the world. With 0 coding experience and half a brain.