It's like buying a Mac. People buy macs to get OS X, and also dual boot windows. If you want windows, you don't go out and buy a $1,500 mac and then install windows on it, you just buy a PC.
Things are a little different, now that the original iPads are no longer supported by current versions of iOS. Since the original iPads haven't been updated to iOS 6 or above, you can no longer get current versions of many applications, so if I wanted to have a current browser, I can't update Safari, and can't load the current version of Chrome either.
Just as older PC hardware can be rejuvenated with lightweight non-Windows operating systems (look for Puppy Linux to learn more), perhaps Android might be an answer to getting current apps since iOS updates are no longer available. I hope it's not the beginning of a trend to shorten the functional life of other Apple products, as my Mac is older than my iPad, and can still run current versions of OS X.