I have one and I have been enjoying it.
For anyone wanting to try out the games, the community pages have community made games within the browser most of the time: https://community.arduboy.com/c/games/35?ascending=false&order=views
EX: https://community.arduboy.com/t/hopper-a-simple-action-game/4293



Its for people who like simple games (theres over 400+ now) and “game and watch” kind of setup. I like putting it in my wallet and bringing it out when I get bored. It gets something like 8-9 hours of battery life. So much that I forget to charge it for weeks on end.
You can also tinker like crazy. I got a couple of games and apps that work with it. Its all C++ but as long as it runs on an Arduino it can most likely run on the device.
I have a miyoo mini plus. And it doesn’t scratch the itch that the arduboy has with simple/tinker games. Both are made for different reasons.
Hope that answers your question!
Guess it’s just personal preference. I’m generally gaming on the train ride into work so I’ve got a solid 30 minute block to play and have space in my bag for a larger device. I’m also not usually looking to tinker with devices much post initial setup but can understand why someone would enjoy doing so. Thanks for answering, glhf.