[atleastoptimal]

If you don't use AI, making a genuinely good game will take multiple years.

I'm not sure how fast AI will speed you up, but many of the things that would take time (creating assets, engine optimization, balancing) could be aided by AI.

[2muchclout]

I’m sure it would speed you up tremendously, would the output be the same though? Someone with no commercial ambitions doesn’t really need to worry about that, but if you do it is definitely worth measuring the trade offs. I’m not including coding in that statement, I think that for programming everyone should use it as long as you are still learning how to use the engine.