It's all tradeoffs. Reflex cameras are pretty standard, also the electronics have been around for a longer time now. But there is a balance in getting things to

It's all tradeoffs. Reflex cameras are pretty standard, also the electronics have been around for a longer time now. But there is a balance in getting things to * have all the basic and possibly premium features * be rather compact and portable * have the right weight * possibly be weather/waterproof * process images fast (including video)... * ...don't drain battery in minutes... * ...but also don't overheat in users' hands * etc