An option whether to rerun all previous steps would save time when nothing has changed from previous steps. Currently, if queries become complicated with multiple sources, it can take up to 5 minutes...
This is essential. So painful when working on a complex data model. Sometimes I start working on a new step, cancel out of it as I change my mind and then have to watch it recalculate which is >10mins as some of my earlier steps involve UNIONing 6 csv extracts. Given the preview is a limited number of rows, it should be very easy to cache each step and not have to re-run it each time. I've up-voted every related topic and am surprised to see these ideas dont have >100 votes.
