Yes. To my point and yours, SB's hero or product card can have exactly the same underlying markup as McDee's. Where those brands, and brands, are able to part is the CSS.
The irony is, marketing agencies that do web design work for multiple clients should be looking to leverage web component bricks. The majority I've seen, are not; at least not yet.
Eh, brands are internally consistent but rarely consistent with each other to the point where that would be less trouble than it’s worth. If you tell a client they’re not compatible with you, they’ll just find someone else to hire.
They're not deciding. The FE dev team is. Look at Bootstrap or Tailwind. Those tools have been adopted by many teams across many companies. A solid library of web components isn't going to be all that different. Who wants to reinvent the wheel then you can pull one off the shelf and get going?
There is not a single soul in marketing at any company - small or big - that's going to see, "Before you deploy I want to see the markup..." :)
