I developed a big chunk of my Scumm games decompiler in London's central line. I was lucky (or unlucky) enough to go far enough each day to always hand an empty seat and enjoy 30 minutes of me time each way.
All on a Chromebook with crostini. Cheap, long battery life and decent keyboard.
My experience of the central line couldn't have been more different - commuting between Bethnal Green and Holborn, often having to wait 20-25 mins on the platform, letting a dozen trains go by before finally managing to squeeze on, followed by 9 minutes crouching under someone's armpit.
No chance of reading my phone or Kindle, let alone using a laptop!
All on a Chromebook with crostini. Cheap, long battery life and decent keyboard.