I'm certainly nowhere near your wife, but I've always thought I'm somewhere on the spectrum, but getting a diagnosis wouldn't impact much. I'm certainly introverted (I loved COVID since it gave me an excuse to avoid people), have manageable social anxiety, and probably a few other related symptoms, but none of that impacts my life in any meaningful way. Of my roommates in college, my "closest" one had been diagnosed w/ Aspergers and was very high functioning (liked social situations, but had to mentally process social cues and would frequently ask if he interpreted them correctly).

I'm guessing a lot of people could be diagnosed somewhere on the spectrum, but don't bother because it doesn't impact their lives enough to need any kind of remediation. If you're happy, able to meet obligations, and have healthy relationships (whatever that means for you), there's really no need to get a formal evaluation.