If you haven't seen it yet, I highly recommend Henry Zhu's (Babel core team) talk from React Rally[1]. He talks candidly about the struggles of maintaining an extremely popular library and the demands and stress it puts on his life; especially now that he quit his job to work on Babel full time.
If your company uses Babel (which it probably does), please donate to Henry[2] or at the least, send him a thank you for his work.