thanks for your words.

I always wonder what the point is of time-boxing in the first place

When all work is done inside of sprints (including merging, testing, delivery, troubleshooting) etc., as it originally is meant, this becomes a really convenient thing. Sales people, the customers or the manager, know at 1pm every other Friday they can come to the review, check out a new iteration, with contiguous items, without interrupting anyone or having to make changes in their full calendar to get in touch. In kanban, i wouldn't be so sure when a good moment is to review with others, in advance.

I like kanban too, by the way.