You effectively are locked in by the OEM, who is the one that has higher privilege than the user. A real linux would allow the user to have actual control over their own system.
I guess "real Linux"'s most arbitrary but concrete definition applicable for TFA is "glibc".
I am very much against this trend by major vendors to push Linux but just as a "VM" or similarly contained crap. MS is doing it (WSL), Google is doing it (pKVM Terminal), etc.
I guess they are reasonable if you want to use a unix-like terminal environment but don't want go your way to flash your hard drive to install an entire new OS.
I myself use linux under WSL because my SSD capacity is very small already and I can't afford reducing it futher partitioning for another OS.
Seems to be a No Real Linux fallacy...
ROTFL.
https://unixwizardry.com/wp-content/uploads/2018/04/UNIX-liv...
Besides Java and Kotlin userspace, you are only allowed to use these APIs on the NDK, notice none of them are Linux, rather C and C++ standard libraries, Khronos APIs and Android specific ones.