It is very hard to gather statistics on this, but my intuition (casual observance) is that torrent seeding has been declining for the last 10 years, and I suspect streaming services play a non-trival role in the decline.
I agree. Kodi boxes and transient streaming sites seem to be the way most people pirate now. It makes sense that people pirate in ways that match global trends. When BitTorrent started piracy and legal consumption both meant actually downloading files, possibly over days. Now people are used to it all just being there, right when they want it.
Plus most popular games are multiplayer, so piracy is unlikely or niche. A lot of software is on mobile devices, or licensed as a SaaS. A lot of the underlying machinery of media distribution has changed, and so has piracy.
