[nvtop]

A lot. POS taggers used to be linear classifiers + features. In 2018 they switched to BERT and similar encoder-only models. In 2023, POS tagging is largely irrelevant, because it was used as a part of a larger pipeline, but now you can have everything end-to-end with better accuracy by fine-tuning a sufficienly large pretrained model (LLM or encoder-decoder like T5)