This topic has been beaten to death several times on /tech/ alone, let alone other parts of the internet/chaniverse. I'll leave this copypasta here which basically explains the whole thing.
Vichan: the software that just won’t dieWhy vichan hasn’t been replaced and probably never will
Vichan and Vichan derivatives such as lainchan have long been the standard of imageboards in the “alt chan” universe. Briefly, Lynxchan looked poised to take over as the imageboard standard, but it’s reliance on mongodb left it vulnerable to data corruption and unreliability issues.
Any semi-competant coder can create an imageboard with 80%+ feature parity with vichan within a few weeks or even days. So why, after all this time, has no imageboard managed to take over from vichan?
Wordpress is blogging software written in PHP, from the dark ages when PHP was a terribly designed language. Like vichan, wordpress is a structureless, poorly written, outdated, spaghettified oldphp-based piece of shit. Yet, it persists. There are countless plugins, themes, and tutorials created for it, which enable countless nontechnical small business owners to create good looking websites with prebuilt themes. The very ease of use corresponds with it being hell to maintain and write plugins for. Ironically this self-induced difficulty has created a whole ecosystem of plugin and theme developers, selling overbloated plugins that perform functionality that could really be done in a few lines of code, mindlessly installed by nontechnical bloggers. Even conservatively, around 30%+ of all websites use wordpress, including major corporations like airlines, banks, and media conglomerates. The fact is, there is a self fufilling prophecy, where a software’s popularity can meme itself into existence. Wordpress is the Kim Kardashian of cms software: popular for being popular, despite an utter lack of any other redeeming qualities. And vichan is essentially the wordpress of imageboard software.Post too long. Click here to view the full text.