Can you really not figure out that the solution to such a problem is to add more detail to your question, indicating what you've already researched?
Let's say you want to develop a 3D game that has to work in all the absolutely most crusty computers that can be found. Then you want go with OpenGL 1.x and the fixed function pipeline. Just observe all the whining that appears. How you should use shaders, and how even shader-based OpenGL 2.x is not sufficient but for some academic reasons you want at least 3.x because it has the core profiles, so that even accidentally you won't be using any legacy functionality. Even despite the fact that games like Angry Birds and Minecraft actually still support OpenGL 1 for the best compatibility.
To the IP drain? The same as before.
So 20 milliseconds? Like in other DSL technologies.
Simple (only tens of thousands of lines code needed, hehheh). You program a Full Secure Erase feature in the phone. It wipes all personal data, resets all the settings, removes user-installed apps, deletes caches and erases the memory card. All the jazz. Filling with zeroes is used where appropriate. Then the phone is put into OOBE (out-of-box experience) mode, which means that on next startup it says "Hey, I see you are using the phone for the first time, let's set up a couple of things."
Make this a de-facto standard feature on every smartphone. You probably want to password-protect the operation so that thieves cannot exploit it so easily to "anonymize" the phone.
Then you just advocate folk about the risks and why using this "FSE" feature is important before selling your phone.
This is not new or unique. The PC is full of games that have ridiculously bad console-to-PC ports; With shitty controls, poor graphics, bad performance, and with absolutely no configurability.
Mmmyeah. I never got some of the mini-games, such as bowling, to work properly with keyboard and mouse in GTA IV for PC. Great quality assurance, LOL.
It is impossible to enjoy idling thoroughly unless one has plenty of work to do. -- Jerome Klapka Jerome