If you had spoken to me two months ago I would have said Crate Training is amazing.
But now that he is 7 months, we are not finding any particular necessity for a crate. He is perfectly happy sleeping on the floor, on a sofa, in the corridor, in his dog bed...
He is still housetrained, without the crate, although I think the crate in the first few months definitely made it easier to house train and get him to sleep through in a cosy safe environment which wasn't our bed!!
What I would say is that a nice quiet room where he can go (possibly with you there as well, almost certainly you there as well at the beginning)without feeling there is massive amounts of noise and ruckus, to sleep properly not being constantly woken up, is quite a good way to get the dog to relax and manage on its own for a bit, even you intend leaving him for short periods in the months to come.
It really depends how noisy your house is and how unsettled or hyper your dog is, ours feels very noisy with 4 loud people (I am not including myself in this!) roaming around, and puppies can get overstimulated. And having a room for the dog to sleep peacefully and chill out, it doesn't have to be an actual crate, has worked for us.
It is also one of the nicest things about having a dog, just chilling with them by your side...So a crate isnt essential, to make your dog feel secure and safe, but it can sometimes, remedy the deficiencies in a very overwhelming busy household..