Comment by Londerson

Tanks for the questions and doubts. I understood the point 1 and 2, but for the point 3: although we are programmers and be part of our mindset to always be learning new technologies, when you will apply for a new job, generally you will looking for the language that has more proficiency, so, remove the main technology, does not make sense for me. For the point 4: If this site earns traction, I will certainly charge for the ads.