The thing that kills this niche is booking a sleeper car ticket on the capitol corridor. Amtrak does all this but better. Train is quieter, there's a full dining car with meals cooked in a legit kitchen, more space to walk around, fantastic view in the observation car. Only thing they don't do right is advertising. Did you know the sleeper car comes with 3 meals a day? I didn't.

On reflection the other issue is that it doesn't go direct into downtown. But you can transfer to BART at Richmond so same same.