Are you looking to save time, or energy?
Someone with a new set will chime in, I'm sure. My own set is over 20 years old, so I've recently been researching new ones in anticipation of replacing them shortly.
My conclusion is that I'm far better off with the ones I have! They are Whirlpool Commercial Capacity W/D, made in USA. They have minimal electronics, top loading washer, and are only now starting to show signs of rust (which I can fix myself). There are many reports of newer machines rusting within the first year or two. The rust is caused by using metal construction that doesn't resist corrosion from bleach.
If you're looking for a stackable set, that means a front loading washer, and my understanding is these present many problems with mildew. They also don't appear to support very high capacity loads. Additionally, you cannot open these washers to add more items once you've started a load.
Even the newer top-loaders apparently lock the lid so you can't easily make changes, and many don't allow you to choose your water temperature--- that is determined by the computer. This is apparently one way they support their energy-efficiency claims, by making it really difficult to use HOT water. As a host, hot water is an absolute MUST for me, so this is a deal breaker. (I refuse to use sheets or towels that require cold water.... but that's another post entirely).
All things considered, I'm not seeing any clear benefit to upgrading, myself. I'll probably keep these machines forever using OEM parts from ebay if necessary.
