The current technology waves are a bit like the transition from vinyl record, to tape, to CD, to Mp3 CD's and then to Mp3's on ipod and other players. When I was faced with a large vinyl record collection plus cassettes, CD's and lots of mp3's, I really had to decide if it was practical to keep converting the old form into the new form or just sell all the previous media forms and concentrate on mp3's. After that, of course, streaming became popular.
My response was to:
- bin my cassette tapes
- sell my commercial CD burner
- stop burning audio CD's
- sell my record collection
- and concentrate on digital libraries of music on my ipod and iphone.
In the DW space, we still have all the relational DB technology that will probably exist forever (maybe) and then data warehouses were invented to provide historic views figures over time. Then came along tools like Tableau that can take millions of rows and convert it into a optimised format for real time reporting. Tableau can also take data warehouse history tables and perform in-memory and columnar processing. I once thought we could forget the data warehouse but it is still required to provide that historic snapshot data. If your current operational system still has ALL YOUR DATA you could drag it into Tableau and then save some large TDE extract files and just use these.
However, most transaction systems will not cope with storing all data and you will need a date warehouse to capture this history and allow the operational system to be perform well.
SO, the DW is still required in large organisations.
In current times, we have VIRTUAL DW's (like Denodo) that bring all current database tables into a single view plus can incorporate DW tables and a wide variety of big data (high volume, high variety and high velocity).
In a sense, organisations that do not recognize the value of a DW, will maybe never GET the value of such a tool. You would also see shortcomings on their data governance and other policies.
AS ALWAYS, THE COMPANIES THAT MAKE BEST USE OF TECHNOLOGY AND PEOPLE WILL PERFORM WELL. THOSE THAT DO NOT EVOLVE, WILL JUST SURVIVE AND MAYBE BE DISRUPTED OUT OF EXISTENCE.