Dobsonians are good for things that don’t require long-exposure equatorial tracking. The Moon and the ISS overhead in the twilight zone are generally the two brightest objects in the night sky, and neither of them are on a precise equatorial track, anyway – the moon is slowly drifting relative to the fixed stars, and the ISS is whizzing across the sky.
Plus there’s tech trickery - these days we can motorize Dobsonians and let a computer translate equatorial (or other) motions to altazimuth mount motions.
Plus you can shoot multiple frames as something drifts across your FOV (or as you manually track with the altazimuth mount) and then stack them in software.
Dobsonians are great for “sidewalk astronomy”, but their huge aperture for the cost also makes them an attractive buy for the amateur astrophotographer.
