Manual counting is practical when the ballots are simple. With Texas and Florida having outrageously large ballots (multipage, double sided affairs), manual counting isn't nearly as simple as you portray it to be.
Strictly speaking, there's no reason a DRE couldn't be orders of magnitude more reliable and secure than paper; its just that all the deployed systems suck.
PVOTE, as a research system, is at least attempting to fix the suck.
Manual counting is practical when the ballots are simple. With Texas and Florida having outrageously large ballots (multipage, double sided affairs), manual counting isn't nearly as simple as you portray it to be. Strictly speaking, there's no reason a DRE couldn't be orders of magnitude more reliable and secure than paper; its just that all the deployed systems suck. PVOTE, as a research system, is at least attempting to fix the suck.