Post facto removal doesn't meet any reasonable definition of a walled garden though. If it did, then the monthly push of the windows malicious software removal

Post facto removal doesn't meet any reasonable definition of a walled garden though. If it did, then the monthly push of the windows malicious software removal tool would make windows a walled garden. Since Windows clearly doesn't fit the definition of a walled garden, you really can't use the same functionality as a reason to call Android one. The only difference here is that it is harder to disable Android's remote push/remote kill. As is noted though it would be relatively easy for manufacturers or AOSP based projects to disable those market functionalities or provide an alternative market. Presumably if they are given a reason to want to some will.