rtorrent VS libtorrent

No 1

rtorrent and rutorrent might suit your needs. For easy setup on Debian you could use this

I've been a habitual rtorrent user but it feels like it's time to move on - it's also a little annoying that this issue has never seen traction.

Unfortunately rtorrent is pretty much dead: https://github.com/rakshasa/rtorrent/commits/master

I know it's not quite the same thing but I started using rtorrent[0] a very long time ago and it still works well for my needs.

Is there anyone who has used both who can comment on the pros and cons?

[0] https://github.com/rakshasa/rtorrent

Better in what exactly? Anyway, rtorrent seems abandoned. The last commit was 8 months ago. Transmission's last commit was 5 days ago. And regarding transmission-cli: "Prior to development of transmission-remote, the standalone client transmission-cli was created. Limited to a single torrent at a time, transmission-cli is deprecated and exists primarily to support older hardware dependent upon it. In almost all instances, transmission-remote should be used instead.".

rtorrent (pkg i rtorrent)

I had a longer answer, but qBittorrent is great and has a great webui/server model if you're running a separate linux box to run it in. If you're on windows, grab 4.3.9 or 4.6.2 with libtorrent 1.x. RSS stuff is nice too. Libtorrent 2.x has issues on Windows currently (read these threads if you want to know more - https://github.com/arvidn/libtorrent/pull/7013 - https://github.com/arvidn/libtorrent/issues/6667#issuecomment-1804035311 ). Please don't bug Arvid about it though. Libtorrent 2.x gets us Bittorrent v2, which is a good thing.

Latest libtorrent v1.2 branch changelog: https://github.com/arvidn/libtorrent/blob/RC_2_0/ChangeLog

You can support this feature by writing a comment in https://github.com/arvidn/libtorrent/issues/7252

Where users could finally download files that were present in other swarms. This would decentralize network more, swarms with valuable files wouldn't die fast, even when updating a torrent, where info hash differs, say tv series, adding new episode, all the previous seeds of swarm could contribute bandwidth and resistance to new swarms, there were nice proposals at libtorrent project (library which many clients we know use), as f.e. not announcing that a peer has files to not overwhelm network, but announcing that he wants them.

How much of it do you want to do yourself vs how much do you want to use pre-made libraries for? Many popular clients rely on libtorrent which is a C++ torrent library: https://github.com/arvidn/libtorrent

FWIW, it seems like there'll be an update to libtorrent very soon that'll address the memory issue.

Here is a link to an issue I found on the libtorrent repo discussing the issue.

Many!

https://webtorrent.io/faq

Notable ones include Libtorrent[1], Peertube[2], and their own Webtorrent Desktop[3].

1. https://github.com/arvidn/libtorrent/issues/223

2. https://peertube-viewer.com/posts/2021-02-20-peertube-viewer...

3. https://webtorrent.io/desktop/