I dont want to be devil advocade, I dont personally use torrent on boxes or such, but I think some of torrents could take quite a long time to finnish, considering p2p network. It kinda makes sense to me, use low consumption devices like openwrt routers, Rpis, or Amlogic, cheap boxes, which runs 24/7 anyway, for such a purpose.
I personally using openvpn server on CE in my parents house for example… They dont have much good router to place it there, and only CE devices are 24-7 with far less power consumption than PC. In my own home I have powerfull router to do TVH/VPN/NAS/DNS stuff, but for installations on my relatives homes, where there is no wrt, then CE/LE saves a day. I would be kinda sad to hear “its just mediacenter deal with it”.
You can say exactly same thing, why would you need PC application on media center, but honestly, openvpn works so nicelly with no infra change on their side, so I am really, really glad to have apps opportunity there, even it is just “mediacenter” for them. I am using some of boxes as NAS even, with no problem, with CapEx/OpEx close to zero lets say (comparing to synology etc…).