I just built this card nudge flow by hand, the card reminder sequence: wait for 7 days first reminder, to add a card, then for 5 more days, second reminder to add a card, then finally after the 14 days, trail expired and moving to the lower tier. Full disclosure, the builder is my own tool, but that is not what I am asking about. What I actually want to know: in 2026, is hand building deterministic flows like this still normal, or are people just prompting their way through? I feel like no m...