This is exactly the take that Google, and companies interested in setting up WEI-enabled web sites, will adopt. When you're talking about business, technical details that will affect a tiny minority of nerds simply doesn't matter. What matters is what value can you capture from the lion's share of the market? And how much is it gonna cost you to support the tiny minority that remains?

Back in the 90s, much of the web was designed for Internet Explorer exclusively. A bit later, Flash took off. Both of these posed problems for users of niche browsers and operating systems, but from a business standpoint, nobody was complaining.