Things that make me go hmmm

I never understand why when businesses decide to redo their websites, they take the old website down entirely and put up a placeholder with the cheery "We're re-doing our site! Check back later!" Sometimes, those animated gifs (remember those from the mid-90s?) of a construction vehicle is displayed prominently. And the kicker is, "later" is always well after you need the information or you've already called to get it from them. I've seen some sites keep the messages up for months and months and it makes me wonder. Did they make the decision to design a new site and think they needed to take the old one down first before they could even start a new one? Did the person they hire to design the new site take longer than needed? Why not design the new one in the background and then upload it over the old one when it's finished? No matter how bad the old website looks, it looks a lot worse when customers can't easily get the information they want for months and months.