Manual testing and debugging apps on multiple devices would have slowed the release of new features.
The immersive user experience of gamers would have been insipid as there would have been no graphics tweaking and performance settings.
Each device and OS has different specifications; a perfect user experience would have been a myth.
Staying in line for hours would have continued with no kiosk or digital signage would have been built.
No Android emulator, no evolution, as the younger generation wouldn't have learned about developing apps.
Anticipating users' next move and perfecting their responses in apps would have been fiction.
Thank god these programs were built to enable developers to release efficient and compatible apps.