Erythritol tetranitrate (ETN) - - cousin of PETN, for which the detonation velocity of ETN is just above 8,000 meters per second - - while PETN det vel is about 8,300 meters per second plus, which is in the top 90% of highest velocity detonation velocities available from high explosives.
ETN is about 3 times more sensitive than PETN and is more sensitive to friction than the former mentioned compound. The decomposition of ETN is oxygen positive: C4H6N4O12 → 4 CO2 + 3 H2O + N2 + 3/2 O.
Why would any professional mess around with something that is 3x more sensitive than PETN ? Easier synthesis perhaps, but life changing or ending, if it detonates accidentally
PETN is the preferred explosive in the widely used "det cord", likely for a good reason, at 3x less sensitive.