Electro Music and it's evolution each decade.

1970s - electro, very analog sounding, Pink Floyd was probably the first commercially successful band to use this technology as it was very new, very large, and VERY expensive at the time.

1980s - electro, digital sounding, more fine tuned, more compact and better sounding as the technology evolves.

1990s - electro, very fast tempo sounding with more emphasis on bass drum and fast bpm, the 909 drum is also widely used in many dance songs of the time.

2000s - electro, more gritty vocals and industrialized sounding, still fast tempo and hard bass drum, but added elements of bass synth as well, and use of analog becomes trendy again, so a lot of it is created with analog instruments/software, and some elements of lo-fi and very early analog sounds from the late 1960s/early 1970s. More narrow sound and less reverb compared to other decades of electro mixing.

2010s - electro, slower bpm than the techno of the 2000s, more dubstep inspired, and more singer based and less "band based as musical bands were falling out of fashion and record labels preferred solo singers to cut costs on royalties", mix of analog and digital still used, but more modern analog is used.

2020s - electro, most songs now are at about 120bpm and are digital, use of analog being trendy in the 2000s and 2010s is now longer trendy. More reverberated vocals and less emphasis on bass drum and more emphasis on snare drum. A more open spaced sound. Trend of solo singers is still a thing, as record companies are continuously trying to cut royalty costs down. Only time will tell how long solo singers being mainstreams will last and the decline of bands will continue.

Computers today have basically taken over the entire process of music creation, it has been this way since the 1970s and has only increased over the decades. Even a full orchestra or garage rock band sound can now be emulated on a computer, royalties have a lot to to with this, as well as the evolution of technology. It saves record companies millions of dollars to have one person create the music from a computer/synthesizer than it does to have an entire band play each instrument, often having to re-record certain elements of the song because someone messed up.

A friend of mine that works at Sony Music explained this well ,as did an acquaintance at MCA, the only way to survive today is to have a solo singer and one person playing the background music and layering it all together on the computer to create the effect of a full band...however for certain elements, such as tv show appearances or concerts they might hire a performer to play the instrument for that one appearance/concert, but that is it. Royalties costs record companies lots of money and streaming does not bring in high revenues like you would think. Spotify has made the criteria higher for labels to make income off of a song played...I think the minimum 1,000 streams as bare minimum...and sadly many songs older than 5 years old on spotify often do not get to that threshold per year, which also makes labels continue to lose money as aq result.