I'd give you $100K no questions asked if you manage to get something even close to Resolve with 2K Astra/Fable prompts, polish included. You vastly underestimate how much work goes into "polish" when software with huge surface area is decades old.
regardless of whether it’s possible, there is enormous value in the community, ecosystem, and learning materials centred around Reaolve as it is right now. the workflow has been refined over years. no one shot slop effort will have that network effect behind it, and if the workflow isn’t a drop-in replacement it’s dead in the water anyway.
I think there's a really interesting tension between what you're saying and what the parent post is saying, and it's something that's been discussed for a long time but LLMs are throwing a new wrench into it: a given user probably only uses 5-10% of the features of a piece of software, but across the whole body of users you get close to full coverage.
I use DaVinci Resolve for editing GoPro, Canon DSLR, iPhone, and Drone FPV footage. I import clips, use the razor to cut them and rearrange them, occasionally crop and zoom, and then encode them down to h264 or whatever. There are a bazillion features that I sort of know exist but haven't ever had any need to use. Could I make a tool using an LLM that covers my DaVinci workflow? Almost certainly, and I don't think it would take anywhere near 200 prompts. I've made significantly more complex bespoke data analysis pipelines for drone flight telemetry in like... a dozen prompts. But I have no illusions that what I would make as my "DaVinci Clone" would have anywhere near the functionality of DaVinci, just the tiny piece of that functionality that I use.