Australia went to Korea with '37 Pattern webbing. Enough said.
When we were alongside other troops with better stuff, we commonly 'found' some of their stuff to issue to our Diggers. In New Guinea, the Diggers often found the long Yank gaiters were superior to the crud they had, so they were quickly adopted as "ours" too. In Korea, Malaya and Borneo you'll often see photos of RAR diggers with Brit webbing and kit. The reason was we usually had crap kit and not enough of it, but our mates that invited us to the party usually did and were happy to share.
Our speed of adoption of new and better ideas as approved from the dim dark dungeons of Canberra, (where all our fantastic decisions are made) is neck and neck with the gestation of an African elephant or the blazing pace of an Antarctic glacial slide.