It is preferable to have electronic voting for single issue EGM where owners tick YES or NO.
Electronic voting is definitely not suitable for large Strata AGMs as the Owners present may propose amendment to motions on the AGM Agenda and those amendments too have to be voted. And this happens and can happen on the day of the AGM. Also at AGM Owners decide on number of Members on Strata Committee, then Owners can file their nominations in addition to those already filed before the AGM date. It’s for the Secretary to decide whether a particular General Meeting is suitable for electronic voting. There is a lot of to & fro at an AGM and hence electronic voting at AGM isn’t suitable while EGMs with one or two issues are.