Check out the Instant Pot, it is a counter top electric pressure cooker, but it can slow cook, make yogurt, cook rice etc etc. Slow cooking had a place but there is nothing better than bone broth in 4 hours or fall apart collagen-rich roasts and cuts of meat in 45 min! The basic one is all you need and you can grab them for $79 bucks on Amazon every few weeks.
Edit to add:
I've done bone broth for 16 hours at high pressure before, the chicken and pork bones fell apart!
Also, pressure steaming potatoes/yams is super quick and helps for prepping more complex things!
Oh! And steamed eggs, they are fast, easy to peel and repeatably perfect! I've done 2 dozen at a time!