

can they be added to the search function in qbittorrent?
Nearly all can. All the one’s you’d want anyways work with Jackett. They don’t work via direct plugins but just run Jackett, follow its instructions and connect it to qBittorrent and you’re good to go searching just the same as before. Some annoying ones occasionally require setting up another software like Flaresolver but for the most part the big easy to get into ones that open their doors annually work without that.
While there will likely be some openings throughout the year the fact is most trackers open in the period from Thanksgiving/late November through early January. TL opens then basically every year, a number of more exclusive trackers do open signups then, some for only 24 hours so get an RSS feed of that and remember to sign up IMMEDIATELY as soon as you see a post as the post on reddit may have been made 22 hours into a 24 hour open window, you just don’t know. TL though at least tends to stay open for several days. So if you have no luck before then, wait until that time of the year and then check daily or even twice daily if you can, once before bed, once earlier when you get up or lunch or after work, whatever.
People are right that they’d die. They’d die or be irrelevant or so full of security holes that many sites would block them on principle of protecting their users.
The reason why they might die sooner rather than later with the corporate and (western) government led seizure and lock-down of the open internet is that a company like Google could introduce a slew of new web standards and just completely overwhelm any devs trying to carry on the work of keeping the code alive. They could in other words bury it in a couple years with a mountain of complex new standards and possibly regulations (another thing big companies love doing when they capture the regulatory agencies is use them to keep out the little alternatives by burdening them with things they with their money and huge size can easily bear).
But whether that happens or whether even with security incidents it struggles on for 4-5 years the open web is at that point doomed. It’s doomed short of some very large and powerful actor deciding to take up the mantle. Once upon a time the EU might have wanted to do that but all the talk of chat control, all the desire for anti-piracy crackdowns, etc it’s not going to be the EU. If I had to make a guess if there is any chance it’s that China or some massive Chinese company does it. But I wouldn’t count on it. However they’re the only ones with anything to gain at all really who might entirely for their own reasons want to create a browser stack entirely free of the west’s control and might open source huge chunks of it to the point open source devs could do the rest.