I have 1.5/900 fibre to my house, and I bring a 2.5 line from the modem to my home office where a 2.5 switch delivers it to my workstation, laptop, and unraid NAS. But those devices are all themselves just gigE I think, and I've yet to come up against a download (even a torrent) that seems like it would have really benefitted from having the entire theoretical 1.5 pipe available.