Yet our ethernet used to drop down and freeze the hub up a couple of times a week (100Mb Cat5, 80m run) mind you that was because my partner decided to move the welding bench to where the cable ran through the workshop.. Seems that the HF start on the TIG wasn't ethernet friendly
I totally agree though that cat6 is preferable for future proofing installs.. yet I still stand that not ever install is in a perfect environment and long runs can cause issues which is another reason to use the best spec commonly available...