I worked with a guy who insisted on using Neovim to work on a large Java monolith project. He was surprisingly unproductive. Took days to deliver features (code) that folks using IDE (Intellij IDEA) could crank out in a matter of hours.
The danger of not using an IDE is that you will fall behind in productivity and get fired because you are not performing at a level expected from your seniority.
If everyone else are coding in an IDE and the coupling naturally follows, you also need to use an IDE to survive in that code base.