I just barely got into text NLP when I could run notebooks with a single GPU / CoLab and get interesting outputs. I've seen some great community models (such as Dhivehi language) made with Mozilla Common Voice data. But if I were going to collect a chunk of isiXhosa transcription data, and try to run it on a single GPU, that's hours of training to an initial checkpoint which just makes some muffled noises.At end of 2022 there was a possibility to fine-tune OpenAI Whisper, so if I tried again, I might start there. https://huggingface.co/blog/fine-tune-whisper

Also I never use Siri / OK Google / Alexa. I know it's a real industry but I never think of use cases for it.