@p @graf floating cities isn't that crazy when you consider the fact that you'd be able to swim in the atmosphere close to the surface. At high altitude it's the right temp, very stable weather, it's the right pressure so you wouldn't need bulky pressurized suits. As long as you're not in an acid cloud you could get by with just a breathing apparatus. No suit needed.

Not having to wear a suit outside on an alien world should be reason enough. Suits suck and nobody enjoys wearing them.

Also since you're not having to pressurized the environments, just change the gases, building large stitches becomes much much easier, cheaper, and lighter. Building a beef farm, chicken farm, hog farm, etc. all becomes doable with current technology. We literally already have the technology to put a dairy farm on Venus. We'd need to refine some of it a bit sure but we could do it. Plants will just grow too. Some will need shading but the CO2 atmosphere is like steroids to them. They just need water. You don't have to worry about the atmosphere at all. Being able to just grow stuff and even animal farms being possible to do is huge.