It's a matter of trade-offs that have to be made based on intended audience and information available. No need to be offended.
It's a matter of trade-offs that have to be made based on intended audience and information available. No need to be offended.
In any event, the cost argument is the purview of the business owner perspective, not the Web developer. And it's hard to look at in isolation. I don't know that many sites that wouldn't love to have another 5% of traffic. Yeah, it may cost more to support older browsers, but driving traffic to a site costs money, whether through ads or spending time on inbound marketing. Trying to bump conversion rates on your existing traffic costs money and time as well.
There's obviously a balance to it. At the extreme end, I know of businesses that support anything with > 0.5% market share because at the volume they operate at, it's worth millions. At the other end, I see startups fight tooth-and-nail working on their funnels, while throwing away legitimate sources of revenue.
Anyway, it seems like we both agree that it should be a deliberate decision.