Ubuntu user, beginner. Equipped with old MBP: Intel® Core™ i7-3520M CPU @ 2.90GHz × 4 and 16 GB ram. Most used apps: Gedit, Firefox, vim, gnome-term, GNU/Octave, minbar, sound, sox, praat, audacity, libsnd, SPTK, nautilus, sunrise, Chromium, Lyx, Latex, Libreoffice, gcc/g++, clang/clang++, Arduino, python3. Save power, more life. Minimal install, maximum speed.