I use Astia for night shots because of its ability to handle mixed fluorescent lighting. Nothing else measures up to it in that regard in transparency film. I might have to go to color negative, which I don't want to do, as I don't care for the whole process that much, compared to just getting back transparencies.
I will also miss its gentle contrast in situations where that is needed, and its better latitude. And its milder color rendition is more suitable for a lot of my subjects.