They could do something along those lines, but that would not be "keeping things simple". Plus, there is not significant motivation for them to do it — plain an

They could do something along those lines, but that would not be "keeping things simple". Plus, there is not significant motivation for them to do it — plain and simple. They could, but so far it's not worth the time/money investment. Every little feature, every little bit of work added and layered onto things has an associated cost/benefit to it. Simply put, it's not worth it to them at this present time.