[ac29]

Decades of legacy code to maintain continuity of business (dont assume for a minute you can export or import data from many of these apps in any sort of sane way). I think a lot of businesses would be open to better designed products, but the aforementioned legacy compatibility and the need to train people on the new software make this a nonstarter. Pretty much the same reasons Microsoft Office is still so dominant, although I actually like the recent versions of office.