I have been keeping an eye on this for a while, there is some good discussion going on here. I shoot in New Zealand, and have a slightly different view in some aspects. Over here, we dont do shooter marking (no pit service), everyone in the pits is getting paid for their service. For this reason, as championships have moved to electronic targets, entry fees have stayed the same, no increases. The need to recoup cost of targets is offset by not having to pay markers/ butts officer. Without a doubt, the days are shorter (it takes a lot less time per shooter at the long ranges, because there is no calling for a target to be examined). It also makes the range officers job a lot easier, at our nationals they tend to be very busy calling for targets to be examined
Over here, the Silver Mountain system is widely used (I think something like half the clubs in the country have switched/ are switching). It has its issues, but overall I still consider it to be a step up from manually marked targets. I have yet to have a shot "go missing" on the SMT, I have had plenty go missing on manual targets. Is it ready for a national level championship? I am not sure. I, and other members of my club, have spent quite a bit of time making the system more robust, and we definitely have fewer issues than when we started about 3 years ago. But the group of us work in IT (with the exception of the electrician), so we have the skills to work on this, not all clubs will necessarily have the same skills in their membership. The other hard part is that some people will never be satisfied with the accuracy, and questioning it. You could spend all day every day firing a shot, and manually verifying that it did indeed land where the target said it did, but the day you stop, they will ask "well, what about that shot?". I think it would help if there were an agreed level of accuracy needed (bearing in mind that even manual targets have their issues in this area), and anyone looking to run a major championship on electronics should have an open day beforehand where people can see the calibration and verification with their own eyes