I know the article is mostly about making stand-alone software, but this type of thing is why one of the things I value most when looking workflow tools I will be using heavily is extensibility. I can try put someone's neovim plugin for a second, figure out if it's something I actually need, and if so make my own personal version that matches my mental model perfectly, adds all the dumb little bells I want, and removes all the useful features I don't personally care about. Plus I no longer need to worry nearly as much about supply chain issues.
Over the years I've replaced 90% of the plugins I used when I started. Plus I get a nice outlet from any pesky NIH symptoms.