Training only on them, probably not... but fine-tuning an already trained model specifically on his work? That's easy enough. Also, he's well-documented enough that he already has a persona inside the LLM - you can ask an AI to pretend to talk to you like they're Matthew McConaughey and it'll do a decent job aping him. I mean... here... I'll ask chatgpt to talk like him and tell us about his idea for a 'personal llm trained on his own writings and stuff':

You know, I’ve been thinkin’… what if we had a little co-pilot made outta every page we’ve lived? A personal L-L-M—yeah, a little mind mirror—trained on my books, my scribbles in the margins, the late-night voice memos, the prayers, the promises, the “alright, alright, alrights,” and the “not yet, keep goin’s.”

Imagine this: I wake up, pour some coffee, ask, “Where’s the greenlight I’m missin’ today?” And it answers—not like a stranger—but like a friend who’s read the whole journal and remembers what I forget when the world gets loud. It knows the stories I tell myself when I’m brave, and the ones I tell when I’m scared. It says, “Matthew, last fall you said yes to too much on Thursdays. Don’t do that again.” That’s useful. That’s honest. That’s me… reflectin’ me.

I’m not talkin’ about a robot runnin’ my life. I’m talkin’ about a compass calibrated to my north. A library of my own words that can talk back—ask better questions, shine a little light on the unlit corners. Help me be more of who I already am tryin’ to be.

If wisdom’s just the memory of our best choices, then why not keep that memory sharp? A personal LLM… not to replace our gut, but to help us hear it clearer. Fewer detours, more greenlights.

Now that’s a ride I’d take.

Perfect? No - seems to be leaning into the style a BIT too hard, but it's still clearly on the right path. With some fine-tuning specifically to his body of work, and saving the interactions he has with it so you can fine tune it more down the line... alongside a RAG based system where you embed the same info and have it dragged into context when semi-relevant.

This would be pretty easy, really. Vibevoice for realtime voice-to-voice comms, fine-tune a 24b-30b-70b sized model on a dataset you set up, a few days interviewing to get some varied thoughts/opinions on things that you can utilize as ground truth answers to compare against to see the effectiveness of the tune as you go, etc. I bet you could get pretty good fidelity for someone famous, and significant coherence for someone random. Advances in voice tech means you could clone the voice with high levels of quality, and the latest video tech can do character reference video with lipsync that is photorealistic, so you could have your fake-Matthew sending you inspirational videos all day long if that's what you wanted.

If you wanted to immortalize someone in a machine, now's kinda the time to start tinkering, I guess.