Then this is, IMO, a problem with the software developers (in the broadest sense, not just programmers). Most e-commerce in fact, DO share the same framing, wiring and plumbing as all the others. This is why you can buy an e-commerce package off-the-shelf and customize it.
If the business is a relatively generic e-commerce store, it should usually not be building bespoke e-commerce software. Unless, of course, there is some technology feature that will be your competitive advantage/differentiator. But let's be honest, that's pretty damn rare in the space of e-commerce stores.
