Many of us do.
We use dental fractives like “tree” instead of “three”, and “datelai” instead of “deadline”. Or, we have said “you got eat this before, or not?” and “Cannot anyhow do like this one, leh.”
It is too early yet to predict the future of Singlish. We use it for ease of communication with those who are more comfortable speaking either Singlish, Mandarin/dialects, Tamil/Hindi or Malay.
Perhaps most Singaporeans are still at the stage where we are defining and forming our cultural identity. And language of course plays a major role in how we view ourselves and others.
As the level of education rises with each new generation, increasing numbers of people will be effortlessly switching between Standard English and Singlish.