I've worked in Ecommerce, but SF was not a concern, especially compared to how big a deal Shopify was for us. Now In EdTech we need to interface with SF for the bigger clients and it is a wild, painful ride. They have their own tooling/language/architecture for EVERYTHING. Oh, and good luck doing SF development locally. To (mis)quote Homer Simpson, there's the right way, the wrong way and the Salesforce way - which is the wrong way but way slower and more complex.