One another reason for loads of standardization in JEE is with performance and scalability guarantees which are not provided by developers but by application co

One another reason for loads of standardization in JEE is with performance and scalability guarantees which are not provided by developers but by application container vendors. Writing an E-Banking application on JDBC is certainly possible , but do we write code to make performance guarantees,for transactional isolation,maintainability or do we only write code for the business we need to attend, this is the question that leads to JPA [or JEE] . JEE stack does involve a steeper learning curve but is a different one indeed!