It does work, at least for imperative languages that allocate things on the heap a lot. Look at the evolution of Java's open source pauseless GCs. Both ZGC and

It does work, at least for imperative languages that allocate things on the heap a lot. Look at the evolution of Java's open source pauseless GCs. Both ZGC and Shenandoah started out non-generational for ease of implementation reasons. They both now went fully generational, with big improvements in real world and benchmark performance (throughput as they were pauseless already).