WTF Apple watches cost $450? You can't even run a text editor on it! What are people buying?
Comparing the flagship model to the much cheaper SE, what they're buying is:
* a larger, brighter, always-on display * additional health sensors, monitoring * can go deeper underwater * longer battery life (if you choose low power mode) * faster battery charging * more powerful processor * twice the local storage * Ultra wideband radio (enables directional device finding) * microphone with voice isolation (better sounding calls, voice recordings) * made from more recycled materials (which may make it more expensive)
I'm happy with my non-cellular SE, I do which charging was faster but I don't know the Series 10 charges that much faster and I wouldn't pay an extra ~$150 for that anyway.
For example: https://apps.apple.com/us/app/tot-mini/id1644609331
Whether it's a good idea to use a tiny watch screen as your text editor, on the other hand...
I don't think there's an app that lets you just edit arbitrary files which can be read by other apps or transferred to/from the watch with something like ssh, just these weird canned things that depend on network services run by Apple and/or the particular developer.