Typically electronics represent a significant decrease in complexity as well as cost and increase in reliability as well as performance. Concerns about such guns and water for example are probably unfounded, as a simple conformal coating on the board would protect it and such coatings are ubiquitous in the electronics industry.
The problem arises when you look at the airgun market, which in reality has only one major electronic gun on offer: the Daystate Redwolf. I don't take issue with anyone buying it, but my point would be I don't see any advantage in buying it either. Reading through the thread so far, the comments in support of the Redwolf and its predecessor can be pretty much summarized as "great trigger" and "haven't had any problems with the electronics." That is great and all, but the integration of electronics haven't really been taken advantage of either. The guns are no more accurate than their all-mechanical counterparts, and are considerably more expensive. They also don't take advantage of the electronics to offer any special features. Sure you can select between a couple pre-set power levels, but mechanical guns have hammer power adjusters as well. Daystate missed the opportunity to integrate bluetooth to allow you to do complete tuning from a cell-phone app, maybe even linked with a chrono. They don't allow greater adjustability. They didn't integrate a chronograph into the shroud to continuously monitor gun performance and adjust accordingly or even warn you that the barrel is being fouled or that there is some other issue with the rifle. Basically they had the opportunity to make the gun "smart" but instead made an electronic gun with no significant benefits in performance.
I really don't mean to upset anyone, that isn't why I wrote any of this. My point though is that an electronic rifle shouldn't be just as good as all the other mechanical guns out there, it should leverage electronics to be much much better. And in the case of the Redwolf just doesn't do anything significantly better. In my eyes it is damned by its own mediocrity, if that makes any sense. And that is why I didn't buy one.
To be clear, I love electronics and technology. I work with them all the time and have great faith in their ability to improve things. Two issues with the Redwolf are that it is closed source, and that it is so expensive very few people own them. This means that there isn't much in the way of after-market for them, so with a few exceptions you're pretty much stuck with the software and hardware. I very much look forward to the day when other more popular manufacturers start making electronic rifles and the feature sets start to explode. Who knows what sorts of capabilities those rifles will bring, things I haven't even imagined, and some of it will be due to companies competing and some of it will be driven by users designing upgraded hardware and software for the rifles. It'll be very exciting when it happens.
That is my take on it anyway.