YouTube TV's biggest stumbling block to greatly expanding its user base (and thus quelling suggestions that it's doomed as a money loser) is that it limits itself to markets where it can provide most of, if not all, of the local affiliates. This is where PS Vue stumbled badly. Last fall, they dropped the reduced Slim package pricing in areas that didn't have all or most of its locals on the promise it would be adding them sooner than later. But thanks in part to the Sinclair merger debacle, not only are they not fulfilling that promise, places that once had all their locals are losing one or two. I lost my Fox, which pushed me into finally giving YTTV a shot after 20 otherwise satisfied months with Vue.
As far as the future of OTT, whatever the complaints people have about these various services, I very rarely hear of someone in the many cord-cutter groups I'm active in going back to cable or satellite after trying them out. And the ones who do go back are usually much older folk and/or people who got offered a sweetheart (limited time) deal to come back. And speaking of my groups, I was quite surprised with how few of the YTTV folk were troubled by the recently implemented DVR restrictions. Most just loved, loved, loved the service and got tired of hearing the complaints from us cranky old men who'd grown accustomed to the standard cable/sat DVR functions over the past 15+ years.