The better workforce printers use a new wider full page printhead that prints quick and uses a lot less in according to the reviews.
I have a old HP 990 that uses the old large carts and prints beautifully for what it is. Hard part is finding good remanned or new carts cheap. I also have a few Epsons but they have issues with the printheads drying out and clogging if you don't leave them on and use them occasionally. I use generic carts in all of them when I find good quality ones but my R800 is getting hard to find good ones and has been sitting, the R220 dried up, and I was given a R260 with new carts that will run out of ink soon. Anyways those new workforce ones look interesting and I might pick one up eventually when I can't find ink or one of the main ones break.
I always check on price of carts, print quality, and features when looking around.
The 990 had built in duplex printing, prints great on any paper, and auto aligns itself when a new cart is installed. The Epsons print on media and do awesome glossy photo prints, when working, but regular documents aren't as nice as my 990, but of course all of these are pretty old now and things change.