This thread is giving me a headache.
>hurr run single mode
Fuck no. OS is meant for multiple-kilometre runs, the optics cost a fortune, their lasers are are powerful enough to turn your eye sockets into smouldering craters, and that power is pulled from your switch (and ultimately the wall). Yet you can run 25GBASE-SR over the cheapest, nastiest OM1 for a dozen or more metres with no problems.
>durr it costs multiple times what copper does
What a flaming crock of shit. As I said, 25GBASE-SR will run over OM1, which is barely more expensive per metre than good-quality Cat6a.
>drool but u need media transceivers everywhere
Any desktop will accept a second-hand Mellanox MCX3* or 4* off egay for pocket change after your 10GbE or 25GbE switch. Second hand optics are similarly cheap, and last forever if treated well - I have 1000BASE-SX trannies that are older than most ni/g/gers and work perfectly.
DACs are also an option, and cheap until you get to ridiculous lengths (but you obviously don't want to thread these through your walls).
Laptops and anything smaller are a lost cause. But they do have wi-fi, which is increasingly a better option than the onboard gigashit copper thanks to 11be, and even advanced forms of 11ax.
