Platform · 2012–2017 · Cloud Scale
Bower
Front-end package manager before npm figured out flat dependency trees. jQuery plugins as a service.
Why Bower faded
Bower faded because npm and webpack made a second package manager for static assets absurd. Flat trees broke on transitive conflicts; npm@3 absorbed the lesson. Official deprecation was mercy; the real death was "just npm install it."

Compare with
Related
Platform · 2009–now
Node.js
JS on the server. Unified the stack and created a package ecosystem that is both miracle and hazard.
Framework · 2006–2018
jQuery
DOM peace treaty for a fractured browser world. Mission accomplished — then frameworks ate its job.
Platform · 2012–2023
Webpack
The bundler that taught JavaScript developers what suffering means. Still under legacy apps; Vite owns greenfield.