"Almost everyone" working on NLP uses one of hugginface's pretrained models at one point or another, sooner or later: https://github.com/huggingface/pytorch-transformers
It's so damn convenient, and so nicely done.
And they keep doing neat things like this one: https://github.com/huggingface/swift-coreml-transformers
Kudos to Julien Chaumond et al for their work!