Apaches weren't really a loved platform in the early 2000's. High maintenance, low availability rate, reliability, crashes, shortage of spares, etc. But like many US programs, the service persisted and things got better. Then they just kept evolving as the Americans use the dam things and had money and time to further develop. Its easy to look back 20+ years and say its the obvious platform now, but at the time, it wasn't. I think it was mainly just bad timing, we had a need and the American gear was still trapped in development difficulties. Airbus sensed that and sold us on something with a lot of unknowns rather than something that was having known issues at that time.
Tigers should have some resale, and for a force not as networked, not pulling high numbers of hours and not looking for deployment/training outside of Europe, they would probably be livable. Its just that isn't Australia. A customer like Poland, might be very interested in them, and they would be an excellent buy. A euro customer, strong French/German connections, urgent need for an attack helo, price sensitive. Would not have any issue buying slightly used Australian gear. While Australia doesn't see how the tiger links into their future force, for Poland it would be a huge step up from cold war Russian gear on now very tired platforms with minimal Russian support, it would be a dream for them, and a nice time to get into the platform.
With the Apache, Australia gets real capability, new airframes (with link 16), before the production line closes in 2026. The next gen platform is likely to have a long development cycle as its not just an upgrade, its likely to have a whole new configuration and new aircraft type, which is exactly what we are trying to get out of. We will do what we always do, hammer the gear, put a billion flight hours on it in no time. We can keep lock step with the US army for updates and we can interoperate with all those other apache customers (eg. UK, Singapore, Indonesia, Korea, India, Japan, US). When we are ready to move on, that gear will also be desirable. For Australia that wizbang new platform may not be a huge benefit for AUS, drones, and other spaces are moving fast. The apache isn't a dead end, its likely to evolve its mission as new uav's come on line.