It is still actually useful. For instance, I was at a café earlier today, and they had a 'teh susu' and I wondered "what is susu" but then I saw 鲜奶茶 below and thought "right" and ordered without wasting an extra conversation turn 😇
In some way, learning Chinese in Singapore is like what I imagine learning Dutch in the Netherlands must be like. You can see it everywhere, but no-one will ever speak it to you