More work not less for DBA's - well for a while
I'm a Project Manager and I hate these products as much as most DBA's.
The naive DBA's who relish receiving fewer calls from marketing will get a brief respite before everything blows up in their faces.
What will come out of this will be sets of dashboards and reports that the business rely on to make strategic and tactical decisions/
As these become more complex they'll take up more and more CPU cycles and take longer and longer to run until a DBA is asked to 'just tune them'.
Once the DBA looks at the half dozen queries generated under the covers by the BI product and optimized them what will come out will be a completely different set of results which will then need to be explained. Of course the person using the BI product will swear that their results are corrupt and the 20 year experienced DBA has got it wrong.
This will be followed by 3 months of strife with meeting after meeting being called to try and find a way to provide the original results before finally someone is fired/ moved / demoted
The victim will vary depending of the size of the organisation / seniority of both partners and the impact on the share price of publicizing the fact that the sales forecasts for next year are accidentally inflated by 130%