The MSI extension by Pagayo helps you disable the MSI system in Magento2. Your stock management will simple use the quantity field like it was in Magento1.
The main reason for you to use this extension is that you will not remove MSI from your Magento2. It will only be disabled and can be enabled in the future if needed.
Magento 2.3.0 - 2.3.3
Magento 2.2.0 - 2.2.10
Magento 2 MSI is for many online store to powerful. It is a very good designed system but for smaller stores or for stores with just not that many SKU's it is too much. So we can remove MSI from Magento. But that can be a problem in the future when we want to start using MSI or if we want to sell our Magento installation and the new owner wants to use MSI. For that reason we created this extension. This way you can simple disable MSI and enable it if it is ever needed.
System > Cache Management
Stores > Configuration > Catalog > Disable MSI