With all trackers.txt trackers being included in generated .torrents,
we can now be certain the magnet (which use trackers.txt) and the .torrent
uses will not be split up in different swarms in case the main announce dies.
(That is, if uploaders add enough of their own trackers and additional trackers
were deemed unnecessary (at least 5 already), the magnet and .torrent would only
share the main site announce)
I looked through the trackers on newtrackon.com. These are trackers with great uptime (mostly better than 99%), but also preferring UDP, IPv6, and pre-existence in the magnet links from different Nyaa mirrors.