Welcome!
In the past 20 years most brick and mortar stores have closed. And CD's have been replaced by CD quality streaming services like Tidal or Qobuz. Class A/B amps have been superseded by highly efficient class D amps. Vinyl and tubes are still around. Active monitors (used by studio professionals) are becoming popular with consumers and useful features are being added. My current speakers are active monitors, Buchardt A500SE, are rated 25-40,000 Hz, have room EQ, (4) 150 watt amps each, built-in DAC's, are completely wireless, and have "Master Tunings".