Artificial grass in hot and humid climates works, but there's a detail that people usually overlook: extreme heat degrades it faster than you'd think. If your area has very high temperatures, the synthetic fiber starts hardening and fading over the years, especially in spots that get direct sun all day long. Some types of artificial grass hold up pretty well (maybe ten years or more if you're lucky), but not all of them. Drainage is crucial, like others have said, but you also need to specifically choose a product designed for tropical or subtropical climates, not just any cheap synthetic grass you find.
Maintenance isn't zero, but it's definitely way less than with natural grass. You'll have to clean leaves and debris regularly, and in humid climates you need to watch out for algae or moss buildup in the cracks. Either way, if your natural grass dies on you every other season, the artificial stuff will probably pay for itself in the long run. The upfront investment is steep, but you save on constant watering costs, fertilizers, new seeds, and all that maintenance treadmill that wears you out in areas where the climate doesn't cooperate.
My advice: before you install, specifically ask the seller or installer about durability in humid climates and whether they offer a warranty. Some products from well-known brands come with an 8 to 10 year warranty, and that already gives you a hint of how long you can realistically expect it to last under normal conditions.