There is a good function “post and new” available on unposted sales documents. Very good function, but this function is more needed on purchase invoice/purchase credit memo. Sales invoices are registered with batch functions/automatic creation of periodic sales invoices. For purchase invoices there is more manual input and so every click less can help accounts payable accounting users.
Ideas Administrator

Thank you for your feedback. We released this feature as part of the functionality in Use the Post and New action on purchase documents in Business Central Wave 2 2019 Release. 
Please refer to the following link for more information: 

Business Central Team