Hmm........yes & no.
I'd say yes cos though my living arrangements mean my Consort & I live w/ quite a few people due to our disabilities, any conversation we have w/ most of them is ½ -♥ed. There's one woman here who cries when she drops things & tells me I'll get in trouble when/if I drop my paper/spill my cup of tea all over myself, & a man who shouts that he's "not a f***ing woman" every 5 secs; the Consort hates it. Our needs are met, so neither of us want to move.
Mudcat reminds me of the community I grew up in which I dearly miss, also mostly older people, who were really interesting; recommending/finding me things they knew I'd enjoy; copying their vinyl for me,. Etc. I find it sad that I see more of a community on Mudcat than where I actually live.
I'd say no, cos I doubt my world would end were Mudcat to no longer exist. I've been on 1,000s of websites & my interest/passion always ends up going.