Substitute for labor due to Technological innovation.
Explanation:
In IT Industries every seconds there is technology innovations are happening, so any IT job oriented end user has to keep on updating to latest technology, he or she missed the update, he or she is considered and lag on IT industry knowledge.
Every day technology innovations are happen around the word.
IT technician (such as programmer or network engineer or IT administration) is not updating latest technology, company or organization will replace the labor.
As programming old programmer user c, c++ later vb.net then now java occupies Major IT industry.
As system administrator Technology innovations happened in operatizing system from windows 7 to windows 10.