"1. Solve reinforcement learning
2. Solve unsupervised learning
3. Gradually learn more complicated 'things'"
That three point list is verbatim the extent of the technical plan mentioned.
> what was the "real reason" they couldn't achieve their original goals?
Paraphrasing, "we needed more money for compute and didn't think we could get enough as a non-profit". Brockman's diary might be a stronger indicator of the real real reason, though.