If your internet connection is fast enough to use Stadia, downloading a 30gb game probably isn't a big deal. Out of curiosity, I opened up Steam and downloaded

If your internet connection is fast enough to use Stadia, downloading a 30gb game probably isn't a big deal. Out of curiosity, I opened up Steam and downloaded the game to see how long it would take. I started the download at 12:36PM and it completed at 12:43PM, so it took ~7 minutes, with Steam reporting peak speeds of 83.2MB/s download (fast.com reported 960mbps before I started the download). I think the download might have even been limited by my hard drive since my Steam library is on a regular old HDD rather than an SSD.