I had the FlashAir which is more or less the same thing. Loved it. Used it for quickly retrieving underwater photography without unsealing the camera as well as backing up dashcams, security cameras, and other such quality of life, never have to touch it kind of applications. I would totally buy more if they come back in fashion. Micro SD is probably impossible, but a girl can dream, can’t he?
Depends how old you consider old, maybe? Computers back in the day were pretty universally light text on a dark background. VIC-20 was an exception but then even Commodore backpedaled on that with the 64. But you might have had a different experience and are only remembering things like Mac OS or Amiga, or Windows, and maybe that has influenced your preference. 🤷♀️ To each their own, anyway.