What are the limitations you've experienced with Shopify?

As I have recently taken a professional interest in Shopify I have spend quite some time digging into all the things you can do with Shopify - not the least related to my main expertise SEO. And I am actually quite impressed with the platform.

Off course nothing is perfect and out-of-the-box it does benefit from some optimization but that is to a very large extend also possible. And the that’s the main issue for me.

However, as a public speaker and author I have ben posting some of my thoughts - and joy of Shopify lately and in response I often get responses and comments based on a blatant misunderstanding of what you CAN actually do on Shopify. Off course you need to understand coding and for certain things you need to move into the app development territory. But thats OK. The important thing to me what can be done.

But off course, there are limitations …

As a more experienced Shopify webdesigner, developer or marketer what do you experience as the biggest limitations?