Hello Emile and Christian,
I use Microsoft Office for reports, templates, data gathering, data manipulation, and integration with databases. A more specific example is that professional oilfield workers create technical reports in the oilfield. Although the oilfield simulation and reporting programs are good, data involving the real world always involves reporting real values. This is where Word, Excel, and Access are involved. The original simulation program creates a majority of the report and most of the number crunching. Measured data MUST be added to the report as this is a legal document. Most people are familiar with Microsoft Office products and this makes it a natural fit to add the actual data to the report. These reports are then kept on a series of servers and are continuously scanned (in Microsoft Office format). All three formats (Word, Excel, and Access) are generated and updated in the field and then uploaded to the main hub when an internet connection is available. Because work is performed in over 80 countries, internet is not always available.
Being forced to work with Microsoft Office means that PC’s will never be obsolete, with both Mac and Linux OS’s will not be allowed in business because of the lack of the ability to create reports. Simulation data has been gathered and refined over 20 years with literally millions of reports in the database. This database is used to create new reports for clients who are looking for tenders on future work.
Charging for an addin would be cost prohibitive (there are approximately 100,000 computers with just one company). As with anything, it takes time to remove bugs and prove reliability. To help Mac and Linux OS’s gain popularity, this would be a benefit to have a multi-platform addin that can withstand the tortuous environment around the globe and yet work on multiple platforms.
BYOD is gaining traction in the oilfield and has some very limiting stumbling blocks in the field. BYOD is common in the main offices for limited applications. Internet driven applications are not even close to being an option, as the internet is not available in remote areas where oil is being drilled. If internet is available in a remote area, the bandwidth is easily used by a rig which costs $100,000 per day in rent for mission critical applications (safety hardware, communication, drilling data, feeds, etc.)
Creating a Word, Excel, and Access document will be around for many years. Creating a plugin for OpenOffice or LibreOffice would be a step in the right direction (IMHO) as there is the ability to read, write, and edit existing Word, Excel, and Access data. The added ability to use multiple operating systems would further enable BYOD in the field.
There is much more that I can discuss. Feel free to ask questions and we can discuss this some more.
Just my $0.02 
Eugene