From a writing point of view, you now have teams of screenwriters working with a director. What's lost in the process is the power of that one heart, brain, gut and soul that makes something an original piece of writing.
Barbra Streisand is without a doubt one of the most honest people I have ever known. There is no doubt in my mind that she will not be doing any more concerts. Of course, she still will be making records and starring and directing in movies.
Only as long as a company can produce a desired, worthwhile, and needed product or service, and can command the public, will it receive the public dollar and succeed.