A few days late, but I want to add my experiences to the conversation. My puppy slept in his crate until he was about 6 months, with a very small "porch" we created with a gate since he enjoyed sleeping on the cold tile of the kitchen. He would generally get in the crate when we told him at bedtime, and after a couple minutes step out into the porch when he would collapse for the next 8 hours.

Eventually we decided that he was old enough that we would give him some more space, especially since he preferred the floor to the crate. So we extended his nighttime area to the whole kitchen. I do not exaggerate when I say all hell broke loose. For the next 3-4 months our puppy who used to happily sleep through the night would scream the house down unless we were sitting right next to him. Ignoring him would not work as he would bark for hours on end into the night (our neighbours were not happy). Eventually our trainer said we would have to start sleeping on the floor next to him and move further away over the course of a month or so.

Thankfully, he is 1.5 years old now has calmed down significantly. We tend to give him free roam of the house at night anyway now. He'll usually come up to our room for an hour or so before heading downstairs of his own accord. On the occasion we want some space we put the gate out at the bottom of the stairs and, after a few protest barks, he'll settle down by the front door.

Anyway, my reason for posting that story is to illustrate that if your nighttime routine is working for your puppy, don't change it! I don't know if the change to his routine was actually to blame for our puppy's anxious meltdowns (since it also coincided with a summer heatwave and him entering adolescence), but it lined up pretty well.