Yes and no. Some things, like _protected_, are explicitly not included because they encourage a style of programming - inheritance - that is not in line with th

Yes and no. Some things, like _protected_, are explicitly not included because they encourage a style of programming - inheritance - that is not in line with the goals of F#. But that's really the only one. All recent "IL innovations" have either already been built into F# or are set for F# 5 (such as Default Interface Members).