My last flight into AU was on CX. I sat in the second Y cabin and while I got an IPC, they ran out of them about 2 rows behind me. Since they hand them out starting at the first row of each cabin, about 40% of Y did not receive an IPC to fill in on the flight. Most would have had no choice but to collect one on arrival in SYD to fill out.
I was also surprised that they did not have any Chinese IPCs. The couple next to me had very poor English and were relying on a pocket translator to make sense of the card and especially the customs declaration questions. Now we could argue that if you can't read the IPC in English enough to fill it in correctly and truthfully, you don't deserve to come to Australia, but I guess a digital IPC could also help in this regard if it offered multiple languages, though in the case of the couple next to me, they were quite elderly, so chances of them being competent to use their smartphone, let alone use an app / website that would initially be in English, is also likely quite low.