Yeah, Bevy is super, super modular and isn't really a game engine, it's just a general ECS framework that has lots of batteries made for it so you can make a game with it, but you don't have to.

It's so gd versatile so people have done cool weird stuff with it: https://www.nikl.me/blog/2024/bevy_ecs_as_data_layer_in_lept...