I definitely stream, and typically have a few different services at any given time, but if I like something I want to own it. "Content" (because that's what films and television are being reduced to) can be pulled from a streaming service at any time, or hidden behind an additional paywall as Mulan is now showing. And a 4K disc is going to look and sound better than a 4K stream under most conditions.
Streaming absolutely has its place, and I will be the first to vouch for that. But that place isn't as a replacement for physical media, at least for me.