The Thunderbolt 3 standard has been available for roughly four years now, but cable lengths have so far generally been limited to a couple of meters
Buy Optical Cables by Corning Thunderbolt 3 USB Type-C Male Optical Cable (49.2') featuring Thunderbolt 3 Male-to-Male Connectors, Up to 40 Gb/s
Optical Cables by Corning Thunderbolt 3 USB Type-C Male Optical Cable (49.2')
Review: Corning's 33-foot Optical Thunderbolt cable allows you to move your Thunderbolt devices (or Mac) far away from your desk - 9to5Mac
Total Nightmare: USB-C and Thunderbolt 3 - Stephen Foskett, Pack Rat
Longest thunderbolt 3 cable for 6K resolution with Pro Display XDR
Optical Cables by Corning Thunderbolt 3 USB Type-C Male Optical Cable, 5m : Electronics
Optical Thunderbolt 3 Cables Begin Rolling Out in Lengths Up to 50 Meters, Page 3
PSA: For Thunderbolt 3 over distance; use *OPTICAL Thunderbolt 1/2 cables!*, Page 2
PSA: For Thunderbolt 3 over distance; use *OPTICAL Thunderbolt 1/2 cables!*
Optical Thunderbolt 3 Cables Begin Rolling Out in Lengths Up to 50 Meters, Page 4