Industry is dynamic and so are the jobs. Every year thousands of people lose their jobs due to market, due to companies restructuring or because the company owners decide to sell it off and the new owner is only interested in the product and not the people.
An impacted person is at the mercy of the company to keep them on payroll else they have to leave the country and all hardwork + talent goes to waste.
We are very thankful for the changes to the H1B in Dec 2015 and adding an additional clause that grants H1B holders with approved I-140, an additional time of 1 year to find a new job if they are impacted by lay-offs, while staying in status would greatly improve overall industry performance.
Less stressed skilled workers = Better Performance = More Innovation = More Successful USA.