This.
One thing I missed when my eldest DD left home, especially, was the buzz in the house. She was the louder one of the two, always laughing, always popping her head round the door to say 'Hi', always chatting. My youngest is much much quieter so I felt the physical change much more with my eldest.
I did get used to the lower noise levels of only having one at home but then when she went off to Uni, that is when it really hit me.
I remember getting up one morning and the house just felt strange and quiet and almost like the soul of it had gone. I remember feeling really sad in that moment and I remember sitting down and looking through old photos and remembering the family moments where we were all together. The fun, the noise, the meals, the games, watching TV together, laughing, joking, being silly. And it was all gone. Life had changed. My kids had grown up and flown the nest. So it was a period of readjustment to go through, for sure.
So just try and cherish it all, even the shit stuff. One day you will miss the sound of laughter from their rooms, the noise of their music, the slamming of doors and the running up and down stairs.
I have again, got used to the quietness now of the house, and really enjoy it, and I love my new life with just myself and my DH. So you do adjust, even if it feels awful when it first happens.
But I adore it when I get both home at the same time and I love seeing my DD's together acting like kids with each other again. It warms the heart.
So yes, take it all in and live in the moment and just enjoy the years you still have them at home.