Aluminum gravel bikes are an excellent value and a smart entry point for most riders. They're stiff, durable, and can take a beating on rough roads or during bikepacking trips — plus they're far more crash-resistant than carbon fiber if you happen to go down.
The biggest concern shoppers have is ride harshness, and it's a fair point — aluminum does transmit more road vibration than carbon or steel. But here's the thing: most modern aluminum gravel bikes come with a carbon fork, which dramatically improves front-end comfort and takes the edge off choppy terrain. Wider tire clearance on gravel bikes also helps, since running 38mm+ tires at lower pressures absorbs a lot of the buzz that would otherwise reach you.
If you're budget-conscious or just getting into gravel riding, aluminum is hard to beat. You get a capable, reliable frame without the premium price tag, and you can always upgrade components later as your riding evolves.