The impact of this movement on the existing DBMS vendors is that there's a threat since NoSQL databases solved the problems that DBMS can't solve.
From the complete information, it should be noted that NoSQL databases were created by big companies to meet the business requirements that DBMS couldn't meet.
Therefore, there'll be a threat to the existing DBMS since NoSQL databases solved the problems that DBMS can't solve. As a response, DBMS vendors can look into making their products available to the open-source community.
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