It simply depends on what your needs are IMO - You can do great magazine design in Affinity, brochures, flyers, logos all that stuff. The only thing I'd miss in InDesign is image expand probably.

Also if you're making video games, and you don't need to export multi-res textures and work on the edge of file formats for advanced texturing etc, if your budget and needs are served by Affinity why spend on Adobe?