There are a lot of decades old embedded systems out there. Every so often you hear about a big company still relying on floppy disks and other old tech, including major railways and airplane companies. Having the source code will help with debugging better than having to disassemble or other reverse engineering.
A lot of isps are rolling out gigabit and even faster internet. Finally having a killer app for it will increase demand for it and shame slower isps to upgrade their old coaxial and copper cables with fiber.