Thanks, interesting. I had no idea.
I know it says extended hours for special events, so I won't jump to a negative conclusion and call it dumb for being 7-7 on weekdays, but as a New Haven resident, I could imagine a weekend day and/or evening in Hartford, traveling on the new train line in a time frame not unlike going into NYC from LI, NJ, CT, Westchester.
For a specific event at XL, Infinity Hall, Hartford Stage, Yard Goats, Convention Center, Bushnell (Park or Hall), Meadows, it's not at all far-fetched. And some of these are things that New Haven doesn't offer.
With such accessibility, Hartford-New Haven can be related like Oakand-San Francisco, St Paul-Minneapolis, Dallas-Fort Worth, Raleigh-Durham, or no less than Boston-Providence, Baltimore-DC