Tor, or more specifically the Tor Browser Bundle is not some huge hurdle to overcome if you want to browse certain content. I imagine for the audience of Sci-Hub, downloading then using Tor is no biggie.
The only real hurdle may be discovery of the right .ONION but once you search for `The Hidden Wiki` on DuckDuckGo you will be soon in Onionland and there are plenty of search engines and directories on there that could potentially point to the latest Sci-Hub .ONION
I can't think of anybody else that has Tor on their computer, or knows how to get it or whether it's safe, or why they should get it. I have had Tor on my computer for years, and I've never heard of 'The Hidden Wiki'.
On the other hand, I know people who have searched for papers and downloaded them from Scihub.
I don't think you know "the audience" for Sci-Hub. It's meant to make the content public, not free for the right people who already know tons of stuff about the dark web.
Tor, or more specifically the Tor Browser Bundle is not some huge hurdle to overcome if you want to browse certain content. I imagine for the audience of Sci-Hub, downloading then using Tor is no biggie.
The only real hurdle may be discovery of the right .ONION but once you search for `The Hidden Wiki` on DuckDuckGo you will be soon in Onionland and there are plenty of search engines and directories on there that could potentially point to the latest Sci-Hub .ONION