Weaned at 2 (I was pregnant;it was uncomfortable...otherwise might have kept going).
There was a large study done of breastfeeding mothers in over 100 countries, which found that 50% were still feeding at 2 years. World-wide, it's pretty common for kids to still be feeding at 3, 4, 5, 6 etc. Full child-led weaning doesn't seem to be that common in Australia, so might be tricky to find many experiences. There are some great Facebook groups with lots of women/lots of experiences that may help (eg. Breastfeeders in Australia).