You know what's really interesting? How many websites out there don't offer light/dark modes.
But it's also interesting how many of those websites aren't ones you're going to spend potentially hours engaging with.
Also as a side topic, it might be interesting to talk about the next steps in accessibility - offering not just light/dark, but high contrast, grayscale, negative contrast options. Also I'd love to see text sizing come back as an option - no I don't mean zooming. I mean genuinely approaching the problem of 'I want the text to be bigger but not other visual elements' (because zooming will do things like scaling up borders and spacing which isn't the same thing!)