The gameplay feels like it slows to a crawl after about day 24, as you're waiting for the more rarely used objects (The kid's Amp, the teen's computer, the A/C especially, and the washer and dryer) takes ages to get up to smart level.
You are reading my mind. I am working on several of these hidden interactions. Some already are implemented and I will continue to add more to make the family and house feel more alive and responsive to the player. I'm glad you are picking up on the "something sinister", because I have big plans and our helpful AI may not be as helpful as it first appears. I won't say more for fear of spoilers. I will release a roadmap soon that will go over some of the scope increases of the game.