"Many concurrent algorithms are very easy to write with a GC and totally hard (to down right impossible) using explicit free." This is not the same as: "All c

"Many concurrent algorithms are very easy to write with a GC and totally hard (to down right impossible) using explicit free." This is not the same as: "All concurrent algorithms are very easy to write with a GC and totally impossible using explicit free." So if you've written a concurrent algorithm with an explicit free, congratulations, but that doesn't mean the statement is wrong.