The cable is 62,000 miles long. The atmosphere goes up maybe 100 miles (0.16%) of it, and meaningful wind only goes up about ten miles (0.016%). The pressure doesn't even register.
That said, I've got to imagine that bottom .1% of the cable will be made differently to counteract all the water and oxygen around it.
That said, I've got to imagine that bottom .1% of the cable will be made differently to counteract all the water and oxygen around it.