What wears out first
The parts that age first are the ones exposed to the environment or repeatedly flexed: the outer coating of the fabric, the seams where panels are welded or bonded, and the valves. Sunlight and heat degrade coatings over time, abrasion from ground contact and handling wears the surface, and folding stresses the same lines on every pack-down. Because the structure holds its shape through air pressure, a small leak matters earlier than it would on a tent that stands on a frame. In a drop-stitch wall the internal threads sit between the two fabric layers, out of the sun, and the outer fabric takes the exposure. That is where inspection should concentrate.
How the construction changes the failure mode
Lifespan is tied to different things in each construction. An air-beam tent carries its load on a few large tubes, so damage to one tube is a structural event, not a cosmetic one. An air-supported hall (Traglufthalle style) needs a blower running continuously, so its practical life includes the reliability of power and fans, and it deflates if they stop. A drop-stitch wall is a thick panel held flat by many equal-length threads, so load is spread across the wall rather than concentrated in a few members. How a given wall behaves after a puncture or a torn seam is something only testing can establish, and Tanda does not yet have third-party data on it.
When a frame tent is the better choice
If a shelter will stay on one site for many seasons, a frame tent is often the safer buy. Its fabric roof can be replaced while a steel or aluminium frame carries on, nothing has to be kept under pressure, and a punctured cover does not change the shape of the structure. An inflatable earns its place where the shelter must be moved, shipped in small volume, stored flat between uses, or put up quickly by a small crew. Choose on how you will use it: long fixed occupation favours the frame, repeated redeployment favours the inflatable.
How to test a supplier's lifespan claim
Ask for documents, not adjectives. Relevant test methods for coated fabric include ISO 1421 for tensile strength and elongation at break, ISO 2411 for coating adhesion, and ISO 4892-2 for weathering under xenon-arc light. A report against these methods, from an independent laboratory, tells you more than a stated number of years. Also ask what the warranty covers and excludes (UV, abrasion and misuse are often excluded), how leaks are located and repaired, whether repair kits and replacement outer fabric are sold separately, and what the storage instructions are. Cleaning and drying the fabric before packing it away is a basic condition of a long life for any coated membrane.