Smoking Boston Butt and Smoker Went out - Food Safety
The standard metric for safety is the cumulative time in the 'danger zone' temperature of 40 to 140°F. Which we really don't know, as that would also include things like bringing it home from the store and stuff like that. 

From the sounds of things, you left it out for less than an hour.  As such, you should serve it ... but serve it immediately or hold it in a low oven or crock pot.  

If you tend to leave out food for people to go back for seconds, and then pack up the leftovers after dinner, I'd also recommend a crock pot or low oven ... and make sure that it's chilled down promptly after dinner.

If you have a really, really long trip from the store, and you didn't transport the uncooked meat in a cooler, it's possible that you might want to avoid serving the food to immune-compromised people, as it'll be a slightly higher risk.**

** Although all food is technically risky ... you have no idea if that pre-wrapped package went for a 30 min walk with a customer through the grocery store before they changed their mind and returned it to the cooler.