sad to see it go. I would much prefer to fly the A300 on domestic routes such as HKT-BKK than single aisle planes.
As I am sure anyone who sells fuel to TG is also sad to see it go, since A300s take a lot more fuel and cost a lot more to fly...
The problem is people talk a good game about "hey, big planes are better", but the reality is very few people will pay a premium for ~400 mile routes (and there is added cost, 737s/A320s are considerably more efficient for short routes). If most people really valued big jets more than small ones, USA-based airlines would still be flying 747s to Hawaii, or on SFO-ORD.