The Sims 4: Tiny Living Stuff is the sixteenth stuff pack (holy...) for this game and comes with new clothing, hairstyles and accessories, but let's cut to the chase, this pack is all about the new lot type and it's tiers.
The pack will appeal to all of those intrigued with the Tiny House Movement where you have to make the most out of a small space... and actually get generous rewards for living there! Each tier (Micro, Tiny and Small Home) has it's own requirements and perks. Basically there's new incentives to go small and a kind of strange 'punishment' for going large with a huge mansion.
So the less you do with doing more... the more you're rewarded for doing more with less... Or something along these lines...