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My assumption is that until people really start to use a track properly, you're just guessing how they'll deal with parts of it. Particularly where track limits are often modified at the end of a season.
In a similar way, in a bike park near here there was a sort of bermed chicane section to slow people for a technical section ahead. It became pretty common to use the first berm to gap the whole lot but obviously then you arrived at the tech section with a load more speed; great for racing, maybe not great if you're sharing the trail. The builder put trees in to stop it eventually; until he saw it done, it never occurred to the builder that someone would gap the section he was using to slow riders down.
Haven't watched the video but it is pretty daft that they were allowed to use that run off during the race, despite not being able to in practice or quali. Or (presumably) after Red Bull told Max to use more run off.
The lack of consistency is mind-boggling. There are white lines on the edges of the track, why not just use them? Some tracks/corners you have to stay within the lines, some the rumble strings mark the edges, some it's the green astro-turf like portion, and some you can just do what you want. Utterly daft IMO.