[alexlande]

We haven't had any performance issues yet. With client-side rendering, those repeating styles aren't being sent over the wire, so you're fine.

For server-side rendering there are two factors at play which have kept this from being an issue:

1. You're only getting the styles necessary to render the current page, which will often be smaller than an a global app CSS file.

2. Repeating styles (as in a long table) are repetitious and compress well with gzip.

Someone at Formidable has been doing some extensive research into this and should have a blog post out soon with more details.