Also, no, memory formation and general "experience" do not change the brain in this way. Memorizing something, for example, has completely different physical effects.
After practicing meditation myself for a couple of years I have noticed no difference what-so-ever. But the act of meditation itself de-stress me (is that a word?)-—relaxing wouldn’t be the right word, because it is not relaxation. Anyway. I’m quite sure I could get the same stress relief by just sit to by down and reading a book.
Parent poster talked about getting relaxation and focus but also said after years that is all they got out of the experience.
If their is another goal or desired outcome then challenging yourself will allow for greater development. Parent poster is stuck in a comfortable place and there is nothing wrong with that but in order to advance more work is required.