To be honest, few people bothered with Rituals when I played 4e, but it's worth noting that there are a few reasons for this.
One, filling your Ritual book isn't easy. While early on, finding Ritual scrolls in adventures as treasure was commonplace, somewhere along the line it stopped being the case.
Two, you needed time, which wasn't always present. Most Rituals are very narrow in use, so there is an opportunity cost to get a Ritual that might be useful, but even if you happen to have the right Ritual for the job, you might not have the time to use it.
Three, since 4e allows you upgrade gear with money, unless your DM is adjusting wealth based on consumables used, some miserly players might feel it's not worth all this hassle.
I'm the weird guy who likes to collect niche spells and magic items, and I'm usually the one in my groups that can be relied upon for a solution to whatever problem we come across. That might mean my bonuses are a little lower, but I'm a sucker for versatility.
But that actually leads to point four- one could get magic items that did what Rituals could do, and usually were more flexible. For example, one of my Ranger's favorite items was something called a dimensional knife. It let you carve a doorway into an object, which you could open into an extradimensional space which lasted for 8 hours. This only took a standard action to do, where a comparable Ritual would take much more time and cost residuum each time.
Plus, I found other ways to use the knife, such as the time I carved the doorway onto the hull of a Githyanki astral ship so we could hitch a ride to their capitol city during Scales of War.
