In addition to what Twitch is doing, a banner popped up in the Android YouTube app stating that you need to upgrade to Premium to be able to "Jump Ahead to parts other users think are valuable". Different from skipping 10 seconds at a time, but there's a non-zero chance that'll be pay-walled too.

It'll only be a matter of time until you can't do anything but watch whatever content Google has curated for you, with no chance to adjust anything at all.