I mean I know lots of people who got Disney+ for Mandolorian which you can't get on Bluray.  So if you want to see it that is your only option.  A friend let us borrow his account to see it as I wasn't going to be one of those people.  But guess what?  I dropped cable and need a way for my kids to watch Bluey and now I have a Disney+ subscription.  We got Netflix for Octonauts when Disney Jr stopped playing it.  I am for sure not too young to remember physical media, but it is just WAY more convenient when dealing with kids for them to stream than get a CD out, especially my 6 year old who was 3 I think at the time we got Netflix.