Silksong when?

As far as I understand it the Frontline is pretty saturated with drones. Heard it in a documentary that I cannot find, of course, but a quick search gave this article https://www.washingtonpost.com/world/2024/04/14/ukraine-drones-russia-war-skies/:

The sheer number of drones means the battlefield is “almost transparent on both sides,” Nepal said, speaking from a makeshift base near the front line filled with parts for FPVs.

So yes seems to me as if it is a almost 24/7 thing. Maybe not over 100% of the Frontline, but at least in the most of it.

(I may have overestimated the meaning of hinterland… I meant like the 10km or so behind the front)

Drones have extreme effect on the Ukrainian battle field as there is no secrecy anymore. Every inch of the front and the hinterland is permanently watched by both sides via drones. But yeah you are right the actual advancement is still made on the ground