STEM? STEAM? STREAM? STHEAM? So many acronyms! Which one is right?

I have seen recently a lot of debate on whether to add another letter to STEAM, separate STEM from STEAM, discuss whether STEAM is an evolution of STEM or whether they are two completely different proposals. Should we include reading and writing? Humanities? These are all very valid questions. As different schools adopt this approach to rethinking their curriculum, it is important to understand the foundation of the ideas.
When STEM (Science, Technology, Engineering and Math) started being proposed, the idea was to promote a scientific education that would be investigative, contextualized, problem-based and hands-on, bringing in also the practical approach used by engineers (problem-solvers by nature!), making good use of the technology and not forgetting that any of this can be without the beautiful language of mathematics. As the choice of scientific careers was on the downfall, researchers and teachers were seeking paths to reengage the kids and get them excited about science again. A country can only grow when you have good scientists and engineers to build it.
More recently the Maker movement started to work its way inside the schools as well. Interestingly enough, this hands on approach brought in the Arts (artisans, artists) and the convergence of strategies was amazing. If you read Sousa and Pilecki's book "From STEM to STEAM", they bring in a solid foundation as to why the "A" has helped enhance even more the science and engineering projects.
I have been teaching science for 30 years, and for the last 5 years have been helping build STEAM curriculum in schools. When I first started looking at this project-based approach, I was looking at STEM as it seemed these 4 areas naturally converged and used similar methods. But in the middle of the process, we started working with the Arts teachers and the jump in quality was unbelievable. They brought in a perspective of bringing significance, communication, design and the humanity to the projects. They contextualized the use of science and engineering, and gave it meaning. We started not only looking at what we built and how, but also why we built it. We started looking at human-centered design. We were working at a whole new level of thinking about our curriculum, actually, thinking about education and our role as teachers. We started asking ourselves what kind of student did we want to leave our school after 12 years. Basically, when we changed from STEM to STEAM, we changed the principles behind what we believe teaching and learning is about. We began to look at education in a more holistic light, where it is getting harder and harder to compartmentalize the different subjects detached from real-life use and applicability.
So, no matter which acronym you adopt, the main thing is to give kids the chance to learn and use science, technology, engineering, arts and math to learn to grow, to become self-confident, autonomous, critical-thinkers, problem-solvers, responsible, reliable, resistant and happy, able to face any challenge life may bring them!