Saying that the tests were performed in 2009 and LO team claims to have improved compatibility doesn't prove anything. In fact, if you had dug a little deeper, you would have seen that 3 out of 4 of those 2009 bugs are still open.[1][2][3] The first 2 come directly from the report, the 3rd is a long outstanding bug that goes back to OO 2.0.

I don't know how you can claim that there are no serious problems with compatibility when you can't even import word docs that have charts or diagrams in them. This is stuff I was doing for my lab reports in HS and our marketing documents are full of this kind of material. These are not esoterica features we're talking about.

In a vacuum, LibreOffice / OpenOffice are perfectly usable word processors. In fact I prefer the LO UI over MSO's ribbon interface. The problem is MSO is the industry standard. So until they take compatibility seriously, they are going to be relegated to home users.

[1] https://bugs.freedesktop.org/show_bug.cgi?id=65865

[2] https://bugs.freedesktop.org/show_bug.cgi?id=66058

[3] https://bugs.freedesktop.org/show_bug.cgi?id=58521