Nu-biscuit
We had built a web application and had an existing rollup build process configured for all the obvious things you can think of (including SVG and JSON files, path aliases, development server with watch, typescript support, etc).
One week I got approval to try migrate to Vite and it was pretty much: delete the existing config, use the default Vite one, and remove all your rollup plugins from package.json (since Vite does all the obvious stuff out of the box).
I was using Rider and had no issues at all. It was automatically using my path aliases. It understood importing SVG and JSON files. I got intellisense for all Vite APIs. Maybe I had some plugins installed or settings enabled from when I was using rollup, but there's nothing obscure as my IDE setup is pretty vanilla.