Subject says it all. High Sierra has some huge advantages for me to warrant doing the upgrade/clean install on my MBA. Except one: iTunes. I don't like the idea of having the apps removed from iTunes, and being stuck having to download everything directly to your phone or iPad. This not only kills anyone without a huge data plan (some apps are pushing 1GB!), and WiFi speeds are not fast enough to carry that type of download without taking a considerable amount of time. If you have a Mac hardwired (read: ethernet) to your router, you'd get much faster speeds (1Gbps to even 10Gbps, depending on the router and pipe coming in)! Plus, you lose a centralized place to manage your apps, backups of your iDevices, and redundancy of those backups (Time Machine). This is not a good move that Apple has made. So with that, if one upgrades or clean installs High Sierra, can you downgrade only the iTunes component? Has anyone with the public Betas or the GM tried that? And if so, what were the results? BL.