Spotify isn't doing anything unique here, and it's not really a marketing campaign to explain away their UI. It's more of a showcase for hiring professionals, developers/designers/etc. Facebook has a similar one -> https://design.facebook.com/. Source: almost 3 years ago

Also, read anything published by Design @ Facebook. Source: about 3 years ago

Provide the same design in 375. Confused about this width? Nothing fits, right? That's responsive design! that's why mobile sites use hamburger menus. See where I'm going with this? Take a look at smashingmagazine.com and resize your browser window. See how the layout behaves? It does not scale really. It's not that because you are making the window narrower, the things become simply smaller, right? Your job as a... Source: about 1 year ago

My favourite example is smashingmagazine.com. Every element appears or behaves differently depending on the available space. Source: over 1 year ago

Smashingmagazine.com layout does that as poetry. It looks awesome no matter where. It's a humbling moment when you resize your viewport on their page and watch every detail. Source: over 1 year ago

Take a good look at smashingmagazine.com start big, and slowly downsize the width of your browser window. Observe carefully. See that? Take your time! It's an ode to responsive design. Freaking poetry, mate! Every design element reacts and adjusts to create a perfect layout no matter the width. There are no tablet or desktop layouts. Only a graceful adjustment of design elements appearing, disappearing, and... Source: over 1 year ago

On one day I looked into a source code of Smashing Magazine (my number one website for web development news). They made a lot of optimisation works on their end and they understand "a fight" with web metrics and poor core Web Vitals firsthand from their case study. - Source: dev.to / about 2 years ago