Back in 2014 Google (now Alphabet) bought Titan Aerospace, a company specializing in solar-powered drones that could fly at high altitudes for long periods of time. The goal was to offer internet access to rural areas that lacked connectivity by beaming it down from on high. In that way it was similar to another moon shot, Project Loon, and to Facebook’s Aquila.

Today, however, Alphabet confirmed to Business Insider that it had ended its exploration of solar-powered drones. In fact according to a spokesperson, the project ended almost a year ago. That would make it part of a big group of setbacks for X, formerly X Labs, the incubator for wild ideas that has suffered under the strict financial discipline being imposed by Alphabet and its CFO, Ruth Porat. Bloomberg offered a rundown of the high-level departures that have occurred since the creation of Alphabet as a holding company and the separation of X from Google:

The X-odus continues

“Loon’s Mike Cassidy stepped down as project leader. Around the same time, Urmson, the self-driving car engineer, left Alphabet, as did David Vos, the head of X’s drone effort, Project Wing. Vos’s top deputy, Sean Mullaney, left the company as well. Other recent departures: Craig Barratt, chief executive officer of Access, its telecom division; Bill Maris, the CEO of its venture capital arm, GV; and Tony Fadell, the CEO of smart-thermostat company Nest, who was also working on a reboot of Google Glass. That project, now called Aura, also lost its leads of user design and engineering.”

Alphabet also put the robot maker Boston Dynamics up for sale, and is said to be in talks to sell off the satellite business it acquired three years ago. It also spun its driverless car project out into a standalone business under the new name of Waymo.

Was flying internet just a lot of hot air?

A spokesperson for X told Business Insider that, while it’s not going to continue with its solar drone efforts, it hasn’t given up on the idea of high-altitude internet. "The team from Titan was brought into X in late 2015. We ended our exploration of high altitude UAVs for internet access shortly after," the X spokesperson said in a written statement. "By comparison, at this stage the economics and technical feasibility of Project Loon present a much more promising way to connect rural and remote parts of the world. Many people from the Titan team are now using their expertise as part of other high flying projects at X, including Loon and Project Wing."