In the many years that have passed since Napster, the copyright and patent trolls have had decent runs.
Copy right supporters in particular have converted their significant capital into lobbying and political power.
Many laws currently enacted, even the fight for Net Neutrality today, traces its roots back to the successful political and legal remedies applied by the MPAA and RIAA.
Take a look at the state of Pirate bay, and the various torrent trackers which have shut down.
Constant applied effort makes people stronger, it will also kill Sci-hub eventually.
1.Something stronger and more resistant to take down
2. Many differing sites offering the same services
3. Elsevier to change they way the operate so it is easier to buy direct from them that use sci hub or the like.
Not sure about your point on the Pirate bay, the site is still up and running.