I'm guessing you're also discounting security updates, UI improvements, better document support, 64-bit support, new graphic options, support for online pictures from a few sources, the newer templates and ability to get others online, the collaboration features, and so forth?
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I agree, coffee is a bad example. It takes a lot less effort to make a pot of coffee than it does to make a good piece of software.
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security updates (at least in logic) should be rolled into the initial cost of the software. just as operational costs are rolled into the price of everything else, this is just overhead, and IMO the cost of selling something in a market that inherently has a unique set of responsibilities.
UI improvement is an objective benefit and certainly not something that every customer wants. i would wager to say the ribbon feature was not seen as an improvement to the original Word UI. this is a feature that customers have traditionally had the option to weigh the pros and cons of in determining if "upgrading" is worth it. not possible with a subscription.
better document support? again, i stress the fact that i am not in a corporate work environment, but where is the benefit of this when .doc and .xls are still standard formats? as long as i can create a file, save it and either print or email it to someone else, where do i stand to benefit from this, especially in the scale of monthly subscriptions? i highly doubt new document support is added or even needed in less than 3 year cycles.
64 bit support? Macs have been 64 bit for what, like 7 or 8 years now? again, this is not something that customers should have to continually pay for, when computer architecture does not change for such long stretches of time. and yet another good reason why people should have the choice to upgrade when the times make it necessary.
the rest of the benefits you mention are all highly objective and would again be things that customers deserve the right to choose when they find it worthwhile. i am also not quite as impressed that MS finally figured out how to allow people to drag and drop images from web browsers when nearly every program native to OSX has allowed this for years. collaboration? online? i use MS Word twice a month to submit invoices on a template created by the company that pays me. i don't need to collaborate and i dare say there are many others who don't as well. not that either of those two areas are not easily accessible for free via the many cloud based services that have popped up over the years.
i don't think you are understanding what i'm trying to say about the topic. your arguments are more based on the necessity to pay for new features, which i think we can all agree is fair. what is not fair is forcing people to continually pay for ongoing development when they are just fine and happy with what they have. when i was making custom cabinetry, i did not require my clients to pay me a monthly rental fee while insisting that they would benefit from quarterly dent fixes and a new coat of paint every once in a while. people like to own things, not watch over them for a while.