Laravel Shift is a service that can help upgrade a Laravel app. The creator of the service, Jason McCreary, published some interesting statistics on the Laravel apps that were upgraded by the service.
At the time of this writing, Shift has upgraded over 8,500 Laravel apps. Every time a Shift runs a log file is created. Initially, these log files were for debugging. A way for me to not only offer support, but log events that let me know how I might improve the services.