Am I using them: No.
Do I find these tools helpful?
How would a bot that has no impact on the world itself be useful? The only thing it could affect would be me. Which is less useful than everything non-bot that I can talk to (i.e. people), since people can both impact the world and affect me anyway.
The OP is asking with respect to language learning and practicing conversation.
LLMs for writing can be far better than a tutor in a high-resource language like English, Mandarin, and Japanese, because they are familiar with many modalities and registers in these languages, and are willing to engage in you in them all.
They can impact you more and more cheaply than language lessons in a classroom (you still need IRL for practicing spoken dimensions)