Seedboxes is one of the best things to have at home.
I also have 100mbps internet and I’ve configured router with QoS - seedbox only gets letfover internet, both up & down. I can work, play (mp) games and download torrents at “full speed”, all at the same time because seedbox will never have a priority.
Using this trick I can fully live with 100mbps. Before that I had 1GBPS and honestly - I don’t miss it that much. :)