If you were to do that, those "systems" would definitely have much less downtime. It might not be as efficient or convenient, but that wasn't the question. If

If you were to do that, those "systems" would definitely have much less downtime. It might not be as efficient or convenient, but that wasn't the question. If the efficiency of convenience of two competing system is sufficient, the less complex one will have fewer parts to fail, and cost less downtime. So for example for a "who touched this cabinet last" sheet, pen and paper would indeed often be better than smartphones.