Project to the next 10 years given the trends.
GPT is great, as they say, it's a great bullshit generator. It's the right direction , but it's just that.
Companies have hordes of lawyers scouring through contracts, e.g. think associates and paralegals (which are not technically lawyers). Expect that a non trivial portion will get axed.
The idea that the amount of work to do is fixed has been predicting mass unemployment since the beginning of the Industrial Revolution
If a bad lawyer sees the case from 10 good ones, he might pick and choose and make ultimately a worse case, or take one of the good ones and just repeat what they said. Which is, in the best case scenario, just as good as having that single lawyer.