Women were never that interested in audio. Back in the day they had systems because that was the only way to hear music and radio beyond a tinny transistor radio. And entertainment was a choice between three TV stations, a few radio stations and records. The expansion of entertainment sources (cable, internet, digital video)) and portability (Walkman ...> MP3 player ...> cell phone) killed off what was left of women's interest in home systems beyond a bluetooth speaker. Men will follow this trend making audio "systems" even more of a niche. Everything will source from a phone or smart home device. Speakers will either be integrated or the preamp/amp will become a blackbox computer totally controlled by your phone or iPad, making audio electronics a commodity. This digital transformation has already happened to guitar amplifiers. All my guitar "amplifiers" are basically computers now. Audiophiles are slightly more stubborn than guitarists. Plus indisputable blind and null tests are easier to perform with guitar equipment, so it will take a little longer for audio to morph. Then look for an Audiogon thread titled "Why do almost all men today hate home audio?"
Why do almost all women today hate home audio?
Why do almost all (99%) of women never seriously, sit, and listen to home audio through even one album?
I knew many, many women that listened, and had there own stereos, in the late 60's and 70's.
They even had big record collections, and some even had real-to-real tape recorders.
Why did they disappear?
What changed?