glibc not landing memory sealing because it might break "anti-cheats" should tell you everything you need to know about that community.

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https://marc.info/?l=glibc-alpha&m=176459968406565&w=3

OpenBSD was able to make gdb and tracing tools work with this, they could too. It's pure fiction.

Theo de Raadt was involved in LKML discussions with aligning Google's mseal with OpenBSD's much simpler mimmutable, it changed quite a bit before being committed.

Reminder: On OpenBSD, most of a programs static address space (.text/ld.so's .text/.bss/main stack) is automatically immutable, and has been for several years now.