Baby naps

My almost 4 month old has been taking 40 minute naps now for over a month. I have read about so many parents being in the same boat and everything I’ve read from “sleep experts” say that their naps will start to consolidate around 5-6 month and I’m just wondering if that is in fact true? Did anyone have crap nappers that suddenly got better? It’s just so hard and frustrating and I’m really hoping there is possible light at the end of the tunnel and not hanging on to false hope.