The 4 Stages of Relationship

Chanced upon something proposed by Matthew Hussey called the 4 Stages of Relationship which made sense to me.

It goes like this:

Stage 1: Admiration

Stage 2: Chemistry & Connection

Stage 3: Commitment

Stage 4: Compatibility

 

From what I understand, it progresses sequentially, i.e. from Stage 1 to Stage 2 and so on. Now, each stage is necessary before you can move on to the next.

In Stage 1, you admire something about someone from the opposite gender. It can be looks, intelligence, money etc. And it doesn't even need to be mutual; can be a single sided admiration.

In Stage 2, the two people develop chemistry, interact and start to build a connection. This is now 2-way, aka mutual interest. Typically in this stage, both of them build a strong connection which leads them to consider an official BGR.

In Stage 3, the two people say yes to each other and enter into an official BGR and commit to each other, i.e. don't date other people, and spend a lot more time together.

In Stage 4, they assess their mutual compatibility and whether a long term romantic relationship is feasible.

Interestingly, compatibility is the one which Matthew finds the hardest to define in exact terms, and I am not surprised! The example he gave is both people can value kindness, but kindness can mean different things to the two people. To put it in simple terms, compatibility will determine whether a relationship will last in the long run. Is there any one thing or two things that is unbearable and can cause the strain on the relationship to be so great such that it breaks apart?

I have a more specific way to scope compatibility. For me, the compatibility can be measured through values, beliefs and goals, i.e. whether the couple shared similar / the same values, beliefs and goals. The way I see it, if values, beliefs and goals are aligned, then I will say that the compatibility is there and the relationship is likely to last.

In C's breakup message, she did mention "I feel our connection is not one that would develop into a long-term romantic relationship". I wonder if she saw this Matthew Hussey video and is making reference to this 4 stages things; which begs the question: she hasn't even progressed to Commitment stage yet, how did she assess compatibility? Or did she observe some deal breaker which she is not willing to tell me?