Sonnet’s Twin25G T5 brings not just one, but two 25GbE optical networking ports to a Thunderbolt 5 Mac. It’s not a dongle, but the enclosure includes two 25GBASE-SR SFP28 transceivers, enabling optical 25GbE connectivity at distances up to 100 meters, with the right hardware. It’s available now from Sonnet, and retails for $999.99