Steel receivers WILL last longer, but I will furnish one great venison dinner to anyone turning over to me a modern, US made major brand alloy receiver'd shotgun that's been used up.
IOW, it's pretty much a non issue. Get whatever you like, shoot it lots, and enjoy.Pick it not for the receiver material, but how it shoots for you.
Note,an advantage to the alloy shotguns is rarely mentioned. On an upland shotgun that's carried miles and miles while only shot maybe a dozen times or so per outing, the lighter weight helps reduce fatigue.
Frankenstein serves nicely as an upland gun and runs about 7 lbs. A 500/1300 set up like it would run maybe 3-4 oz less.