I agree, that's to extreme, otherwise some people would have to buy new furniture quite often.

Luke didn't get a new a bed either after he broke up with Rachel or Nicole.
And Lorelai didn't get a new bed after Max and she kept the one she had with Luke when Chris moved in.

So I don't think they will change it now, especially since Luke might not use it for awhile or maybe never again.

But I'm curious if LL get indeed back together if the house Emily wanted to buy them is mentioned again. Or if the CS is the place where Lorelai will stay forever, regardless if she's in a relationship or not.