I think it's related to the number of open connections. If you have 100+ torrents you're going to have a lot of open connections to leeches, so your new downloads will have to wait for slots to open.
You could fix it by setting all of your seeding torrents as low priority, so your new normal-priority downloads will start.
I think Lemmy should display a simple warning on sign-up that everything you post on the fediverse can't be reasonably ever deleted, because it's going to be shared to possibly infinite different parties.
Yeah, that's what I also wonder. Lemmy is still too small to attract any attention from regulators, but I wonder how the GDPR would work with federation.
There are some differences with normal social media though: every instance is managed by different people, so in theory you would have to ask every federated instance for your data to be deleted.
Or, maybe, posting on the fediverse may be compared to spreading pamphlets with your messages to many different people; you can't expect a reasonable way to "recall" everything you shared with the public.
I don't know, I'm not a lawyer. But it's going to be interesting. Meta, in the meantime, decided not to risk it at all and their fediverse integration just doesn't work in the EU.
And where do you store them? Do you have a NAS? Or a big disk for backups?