Can't say for search (it seems like massive work indeed - or maybe you can actually build a decent and comprehensive search engine with few people but with a ma

Can't say for search (it seems like massive work indeed - or maybe you can actually build a decent and comprehensive search engine with few people but with a massive amount of money), but for the browser they really provide a browser UI (and I'd guess most of it is actually built by Google too). It requires work, but it's not massive like a browser. There are many browsers out there, maintained by a few devs, sometimes in their free time. Konqueror, Gnome Web, qutebrowser, WebPositive... Whatever the SerinityOS is doing, reimplementing a browser engine from scratch for their browser Ladybird [1], is vastly more impressive. [1] https://github.com/SerenityOS/serenity/tree/master/Ladybird https://github.com/SerenityOS/serenity/tree/master/Ladybird