When I started getting into O gauge I was going to be conventional only, using the ZW-C's handles. Then I got the VisionLine Big Boy (The BB always has been my favorite locomotive and I knew if I didn't get one I would regret it.) and figured I should get the Legacy command set to be able to use all the features. First time I set up an O72 circle on my carpet and ran that BB with the Cab-2 I was blown away. It had completely changed my expectations on what I can do running trains. I love using the Cab remotes. On that other hand, I hate LC remotes, just something about them I really don't like. I got some for the kids to run but they don't even like them, they rather use the Cab remotes. Since some of my newer Legacy locomotives also have Bluetooth I tried the app and controlling them that way. I hated it. if the locomotive got too far from my phone, it stops. If I get the train going and turn off my phone it stops. I can turn my Cab-2 off and the train just keep going. A remote with buttons is easy to get the button you want. A screen not so much, too easy to fat finger and get the wrong button. And the slider for speed is so clunky. To me I can still be very hands on with the remote. All my turnouts are manual and there are no uncoulers in the yards, so having the remote makes hands on operation so much nicer. I can be right there with the locomotive, spot it where I want and then uncouple or make sure the couplers locked. I couldn't do that with a transformer handle. My layout is wired to be able to run conventionally with the transformer handle, but I've actually haven't done it in a couple years, would rather control the track voltage with the Cab remote.
As for the side topic, I absolutely loathe vertical video. But I also still buy and own physical media. My phone is not my media consumption device of choice. It's for phone calls, and the odd time I need to look something up when not near a bigger screen. But sadly the modern world isn't like that anymore.
