Last remaining AirPort Wi-Fi accessories no longer on sale from Apple
Apple has stopped selling the last two products in its AirPort networking line, the AirPort Extreme and the Time Capsule, marking the end of an era.

The company officially discontinued those products and the AirPort Express in April, but said it would keep on selling remaining inventory until it was gone. The only way of getting one of the peripherals now is used or through a third-party vendor, as long they have their own stock.
Apple has promised continued software/firmware updates for the AirPort line in order to fix security and stability problems. An August update for the Express added AirPlay 2 support.
The company reportedly dissolved its AirPort division in 2016. Even at the time the development wasn't a surprise, as the AirPort Extreme and Time Capsule saw their last major refreshes in 2013, and the Express in 2012.
In place of its own Wi-Fi routers Apple has chosen to carry third-party models like the Linksys Velop.

The company officially discontinued those products and the AirPort Express in April, but said it would keep on selling remaining inventory until it was gone. The only way of getting one of the peripherals now is used or through a third-party vendor, as long they have their own stock.
Apple has promised continued software/firmware updates for the AirPort line in order to fix security and stability problems. An August update for the Express added AirPlay 2 support.
The company reportedly dissolved its AirPort division in 2016. Even at the time the development wasn't a surprise, as the AirPort Extreme and Time Capsule saw their last major refreshes in 2013, and the Express in 2012.
In place of its own Wi-Fi routers Apple has chosen to carry third-party models like the Linksys Velop.
Comments
We had a big external drive plugged into the USB port on the Airport. Our new router doesn't even have a USB port. The one we tried before this one had a port and allowed setting up the drive as shared storage, but it would not work with Time Machine. Apparently there's something unique about Time Machine that the router must specifically support. Just because a router allows attached storage doesn't necessarily mean that Time Machine will work. The majority of routers we looked at didn't.
Not that we particularly miss it. Before we made the switch we wanted to make complete backups of all our computers. We started with mine, a Touch Bar MBP with about 750GB stored on it. When it still hadn't finished the initial backup after THREE DAYS we gave up on it.
(I’m also in mourning for Apple’s range of monitors and their print service. Oh well.)
Or, is Apple expecting that 5G could take over that task?
I think there is more going on here than we know.