I do this semi-regularly, partly because I have issues with eye strain after years of staring at computer/phone text 18 hours a day. I've also enjoyed sleeping in complete darkness since I was a child and don't like sudden brightness, so I got used to getting around my personal spaces without needing to see much. I don't believe that what I practice doing is anything like what a blind person actually has to deal with and I don't have any desire to be blind myself, but it's an interesting thing to do sometimes.