I think the premise is wrong. That "we" are still using it en masse and in ever increasing amounts. We just call it different. Or use different underlying prod

I think the premise is wrong. That "we" are still using it en masse and in ever increasing amounts. We just call it different. Or use different underlying products. Nearly all web frameworks have some worker system built in. Many languages have async abilities using threads and messaging built in. The only popular language and ecosystem I can think of that doesn't offer "worker queues" and messaging OOTB is JavaScript. We are using it more than ever before. We just don't talk about it anymore, because it has become "boring" tech.