QA - glass ceiling or "new" old ways of developing yourself

Let's talk about the QA career path outside QA. How to move from testing to neighbouring areas of IT and not only IT. Let's consider the development models and why the T-shape is no longer fashionable. 

How QA knowledge and skills help in other roles, and vice versa, what knowledge and skills in other areas can we already use in our current QA work. 

I will show the ways – through practice and real cases, not the theory of transitions.