PTP microwave is very much in use by many carriers, it's absolutely essential for a lot of modern cellular network builds. But the actual microwave horn antenna

PTP microwave is very much in use by many carriers, it's absolutely essential for a lot of modern cellular network builds. But the actual microwave horn antennas in the 6 GHz band, that typified the inter-city AT&T long lines network, are 98% decommed in place these days. You would be very hard pressed to find a site that still has the waveguide, waveguide pressurization system, and a live FCC part 101 licensed 6 GHz radio running on a horn-to-horn path.