Over a decade ago California de-certified Diebold & Sequoia machines because they could be so easily hacked. Since then we've really strengthened our regulations regarding the security of our votes. We still use optical scan ballots in many counties, but they've been certified not only to be secure but to be part of the state's larger, able-to-pass audits security system. So it is possible and even practical to use secure, audit-able optical scan systems. Which means states that do not do so, make that choice for a reason. There is a correlation between GOP states and retention of known insecure vote collection & tally systems. Also, those known insecure systems are made & maintained by GOP companies.

In other words, it is completely intentional that those states with such surprising results used the known bad systems.