Not to downplay QBE, but the initial goal of QBE was to provide 90% of the performance in 10% of the code, until it was changed to 70%. You generally don't know

Not to downplay QBE, but the initial goal of QBE was to provide 90% of the performance in 10% of the code, until it was changed to 70%. You generally don't know how much of Rust (or anything else) is possible without actually trying.