I have been using Emacs for 35 years and I am still learning along the way. It has been the one constant across Solaris, Linux, Windows and macOS for all that time.

That's amazing! It would be very interesting to see what a config spanning 35 years looks like, and what your workflow is. If you could write a blog post about it, I'm sure others would appreciate it as well.

I suppose this goes for any Emacs user. There's so much we can learn and be inspired from by seeing how other people use it.