Download Specific Products from BigCommerce to Core (Not the whole Catalog Every Single Time)

As a followup to the planned feature request here: https://help.core.cin7.com/hc/en-us/community/posts/12536136863631-Download-Specific-Products-from-Shopify-to-Core-Not-the-whole-Catalog-Every-Single-Time

I would like this to be implemented in the BigCommerce integration as well. This is a huge pain to deal with when you have a large (30K+ products with images) catalog. The process takes many hours to complete and generally will end up with some sort of error wheich stops the process from completing. 

I would think it would be an easier step to just add new products as they are added in automatically. Can you not come up with a way to automate the new product addition process?