Yah ever since scarcity started LS belts were really just butchered and never came back since. The NPC mining belts gobble the belts up due to how thin they are. Instead CCP went with ore anoms for LS mining. In some of the largest ore anoms depending on the ore there were 1bil+!
(NPC mining fleets don’t mine ore anoms)
I think the anom mining is ok in my book. Feels strange though I wish CCP did do something more with LS asteroid belts.