Unfortunately that's what they've been doing for years and years now.. IE 6 is definitely reaching its end of life and companies that depend on it are unfortunate. Probably at the time, they never thought of designing a system that would be independent of the platform. All new PCs come with IE 7 or 8. Applications that only run on IE 6 would mean they would only run on Win XP - companies would have to upgrade as any new computer that they purchase will most likely be incompatible with their application based on IE 6.