You cannot fight a summer offensive when you have 100km long gaps in your air defenses, period, end of story. If russia tries it will just destroy them faster.
Frankly it is kind of hilarious that the international media thinks there will be.
An air defense gap like this is a bigger problem than just the missing gap itself, it makes russia trying to locate and plug gaps elsewhere in their air defense network by working backwards from Ukraine strikes an impossible task because maybe all the drones came from that huge air defense gap? Or maybe they exploited another route russia isn’t aware is not adequately defended?
The uncertainty snowballs quick.
Of course, but Crimea has been one of the top sites to protect (with Moscow, St-Petersburg, …) so yes exactly, and when Crimea is ripe, the rest will be hanging in there on a thread at best!