Seems like I've been doing more and more restretches the past 5 to 10 years. I just did a restretch in a new installation in two bedrooms. They hadn't even put furniture into the room yet. 15 years ago, that wasn't the case. My theory is that a carpet can't be stretched in nearly as tight with a stinger, than with tubes. I've actually never used one. I also think that guys these days don't know how tight they are supposed to stretch the carpet. Carpets 'back in the day' used to come with a flyer inside the roll saying to stretch "drum tight" and sometimes had a seaming and stretching procedures. It's rare today even to see a warning inside the roll to "STOP" if the carpet has obvious flaws. I guess nobody cares anymore.