SD-WANs are catching on due to the needs of business enterprises asking for a technical solution to address problems that have been prevalent in legacy networks.
Companies have begun to realize the limitations of their older networks, and are looking for solutions to meet increasing business demands.
SD-WAN for businesses will soon be the norm. It is estimated within the next five years that around 60-70% of businesses will be replacing MPLS circuits with software-defined WANs.
To know more : https://www.extnoc.com/sd-wan/why-sd-wan/