I am a firm believer that you can never truly understand someone until you live with them. It doesn't matter how well you think you know them, how long you've been in a relationship, or how often you've stayed over at each other's house. As soon as you start sharing your life on that level, it upgrades the dynamic to an intensity that many proceed to struggle with. I've seen numerous, seemingly rock steady couples face their downfall when they took the plunge of cohabitation, and it's made drastic changes to my own relationships as well.
Long story short, it's best to be well informed when you make such a major life decision. Maybe you shouldn't take all of your advice from a Twitter thread, but it can't do much harm to listen to what some people had to say about how to go about moving in with a partner. It might not be an easy ride, but it's worth it if it works. I am totally not envious of the amount of money it can help you save.