The new Insta360 ONE X4 definitely has improved image quality during good light and there is also improvement on the audio capture as I was not using any wind muffs on the camera. Had it mounted on the handlebars with the Insta360 anti-vibration damper base.
It is great for reframing as I can now feel relatively confident reframing the 8K captured footage down to 4K and when I was shooting on the X3, 1080 would be more or less the limit for reframing edits.