What Should I Use?

There will always be a long debate if there's a discussion about "What kind of software should i use?" because each side gave their advantage for their own side. But i just read in Newsforge a good article about "Why proprietary software is dangerous for business-critical applications". It's not meant to blame proprietary or just use open source as the solution, but at least, you will get an idea what will happen in the future if you are too dependent on a proprietary software. Well, the advantage is that you will get support for it, but as long as you paid for the license and if they were merged or bought by other bigger vendor and they didn't care about the old version, then you will have a nightmare until you get the new system or migrate to other system.