I will sleep in the nude every night until I die. The only time I won’t is when I stay at relatives’ or friends’, and I’m worried I’ll surprise someone.
The one argument I can see for sleeping in clothes is that it’s easier to get out of bed on a cold morning. As it stands, leaving the warm bed is an incredibly hard challenge to face first thing in the morning. The second is leaving the warm shower. I have to shut down all of the firing neurons that scream “turning off the warm water will be the worst decision of your life” or I will never leave.