I don't change my LO into pjs...

JK
My LO is 4 months old and I keep seeing posts about mamas talking about changing their LO into pjs as a bed routine. My little guy is usually in a onesie so I don't change him... if he is in nice clothes or pants I will change him but 90% of the time I don't... he goes through so many outfits as is, I can't imagine changing him every evening as well. 
Am I the only one?