In my case that's not true, I don't like or trust Hyperion for the simple fact that after buying OS4.0 they left OS4.0 users in the lurch after just one update and now they want folk like me to buy OS4.1 or OS4.2... fat chance... 
At least there was one update I guess. It's taken so long I actually don't remember the timeframe for OS4 releases!
Um, After 30 months of development, April 2004 saw the OS4 developer release. 32 months later in December 2006, OS 4.0 final arrived (a ridiculous long time from when Hyperion started the port from the 3.1 sources - 5 years!), then September 2008 for 4.1. Nearly two years if you go from final version to final version - comparable to a Mac OS X release cycle - moreso if you count the 'developer edition' as being '4.0 final but we can't call it that because of legal wranglings'.
How I see it is that Hyperion took a very long time to get on track with OS4 development. Certainly it isn't a money spinner for them - how many people bought it in the end - a thousand? Maybe two thousand! Two releases in ten years can't have been bringing in the dough, and I remember that they said they had to take on other paying contracts when they could to make ends meet, delaying the OS development. I presume that 4.2 will be coming out later this year - three years after the previous version which is a perfectly adequate time frame for a paid OS update - so they might make another fifty grand or so from sales. Not a lot is it? Certainly not for the stress that it has brought into their lives.