My experience is that XL is only good for weekend nights and events. PAX, 4 or less, who can afford to spend money will use it just for the extra space when going out to dinner. PAX will use it when X is surging or not available. PAX tend to travel in groups during those times. Also, prime time is a multiplier to higher XL base rate. The drawback is that it’s bad enough hauling 4 drunks around much less 6. XL’s get poor gas mileage.
My XL is also Lux/Select. So I can supplement with those rides. I made some bank last night with Lyft 250% on Lux and XL. But with Lyft switching to the flat rate PT next month, I may leave my XL in the garage