This is generally referred to as 50Gpbs. It’s impressive, but there’s no need to use inappropriate scales.

The current maximum speed per single-mode single-core fiber (aka, the typical FTTH ones), is on the order of 400,000,000Mbps, or 400,000Mbps per channel. Not much leapfrogging there.

https://en.m.wikipedia.org/wiki/Fiber-optic_communication#Parameters