Made some tests.
In the process of rearranging the base to a clear steam infrastructure. Comb like, outgoing from the main bus with a lot of pumps.
Pipes are full with steam > Less destruction by empty roboports.
Big projects, like paving a city block should be planed and cut to smaller pieces. Clustering ports helps a bit as long as the pipes can provide enough steam
Main issue: When robots change their direction because they need to refuel.
In vanilla they turn from their original destination to the next roboport and go slow. Here they go down, which is intended
But they die mostly about 5 squares before the saving roboport. So an adjustment for some extra fly reach might fix most of the death.
Compared to copper-robots the distance is shorter.
Might test an outpost with copper bots and their behavior.
Link to my savegame: https://tinylink.net/U8dci
Loss of robots is intended and a good feature.
To all: Prepare to loose couple
p.s.
Is cancelling the destroyed notice with beeping sound for every dead robot necessary or can it be turned off?