My family just +1'd itself. The newborn sleeps with us in the master bedroom for now, but we will move him when he's a few months old and no longer requires attention several times each night. Our plan is to let him share a bedroom with his brother who is 3 years older.
That would give us 1x kids' bedroom and 1x kids' play room, and we somehow think/hope/feel that this is better than each one having his own combined play/bedroom.
Can you share experiences with benefits/drawbacks of either of these options?
My own experiences don't really apply because both my wife and I have a twin brother (joke: ...but not the same one, haha) and we shared a bedroom for the first number of years. I don't know what factors are relevant for different-aged kids.