Is Djanet and the Tassili region worth the extra effort?
Djanet is worth considering when the Sahara is a central reason for the trip. It is not a tidy extension to a broader North Africa itinerary, so build around it or leave it for a journey that can absorb the logistics.
Answer
The appeal is not difficult to understand: immense desert space, rock formations and the sense of entering a landscape that does not behave like a conventional sightseeing route. The friction is equally real. Access can depend on flights, guides, permits, security conditions and a level of preparation that is easy to underestimate from a map. Djanet does not work as one more city stop tacked onto Morocco, Tunisia or northern Algeria. Treat it as the route's anchor. Confirm the operational requirements first, then shape the rest of the trip around the available dates and the desert season. If that level of planning feels excessive, save Djanet for a trip that can give it the time. The Sahara deserves a trip that can carry its logistics without resentment.