These pro-sumer type solutions are apparently just more situationally sensitive, so you might have no issues you might have issues. And the problem is you won't know until you have commited to it enough to find out.
I guess at least with the more upper-crusty solutions is that you can be pretty sure you won't have issues, and if you do there's only one vendor to communicate with (aka yell at) about it to try to figure it out.
I think this comment sums it up really well.
But it is difficult for people who never had house automation before to commit to a (relatively) expensive pro solution, so they go with the seemingly equivalent entry line. Then after experiencing all the issues they may wish to upgrade, if they get a second chance.