I got my copy of the game on launch day, but was particular about the map, native fruit, and airport color and didn't actually settle into what would become my town until a few days afterward. I've kept the same island since that point though.
The concept of restarting and losing all the time invested, items and bells acquired, DIYs learned, houses paid off, etc. has never appealed to me. Since picking the game back up to potentially participate in the current forum
Island Blogging event (not sure if I will or not, time's running out and I don't know if I have ten worthwhile enough posts to make about it) I've been considering perhaps making a second town though, if I should ever find myself purchasing a second Switch, but that's as close as I'd get to starting anew. So yeah, it has been an easy choice to just keep the one from the beginning.