I don't think the weight would be much but yeah cost.only downsides I can think of are extra cost and extra weight
A rear axle swap can be done in a couple hours with jack stands, the $2k…um no. For the price Mopar will likely want for minimal gain, I‘d upgrade to a fusion semi float Dana 60 rear axle if I was worried about the rear 44. Of course you’re looking at $7k for that upgrade.Peace of mind - less stress on the axles when carrying weight at or above the GVWR.
But you're correct that it's probably not worth doing if it's a really expensive and/or difficult process. I would only consider it if it could be done for, say, less than $2k and a weekend and a 12 pack of beer. If it's any harder than that then it would be easier just to trade in my 23 for a 24, or just live with my axles the way they are (which hasn't been a problem so far, and may never be one)
I had not heard of 3/4 floating axles either....In all my years and even schooling I've never heard of a 3/4 floating...
Most people wont need them. It's a nice thing to have if your tires are larger than 35s, or if you're one of those people who build over accessorized overland rigs. The other good thing about a full float is if you break an axle shaft in the middle of nowhere, you can still drive it out.So is there any downsides to full floating axles?