Apparently one of the city's "demands" when they were discussing building Allegiant, was that UNLV would be able to play all home games there. I don't think they've used Sam Boyd for anything, besides maybe covid stuff, since Allegiant was built.
Which is a bummer because it's like 5 mins from the house, looks like a cool stadium, and from the photos I've seen has some amazing views.
Allegiant Stadium is pretty epic though. Walking across a shut downed overpass, crossing over a traffic packed I-15, staring off at the buildings on the strip, with 20-70k people after a game, pouring into the casino and partying for a few hours is pretty epic too.