The experimental features compiletimeFFI, dynamicBindSym and vmopsDanger are not documented in the experimental manual as of 1.6.0 (full list). Since vmopsDanger seems to do very little and compiletimeFFI seems to be unfinished, I'm not sure if they need to be documented. dynamicBindSym is documented in macros.bindSym and in 0.19 changelog however, which may be enough.

However the following experimental features are documented in the regular manual instead of the experimental manual. Don't know if this is intended.

• strictEffects (manual)
• unicodeOperators (manual)
• overloadableEnums (manual)

Update: Since #19173, only compiletimeFFI and vmopsDanger are not documented, and strictEffects is still in the regular manual, because it may eventually leave experimental status.