One aspect of drone wars that I have been observing also is the importance of naval drones. For example, Ukraine successfully used it to scare away the bulk of the Black Sea Fleet; now drug lords in Colombia are already using them to send drugs to Europe.[0]
A plausible next step would be, if not already done, to have a fleet of small but powerful naval drones that act as sea buoys to sweep the sea for submarines - this would have the potential to complete change submarine deployment strategy.
Especially for countries with massive borders, including maritime borders, a fleet of aerial and naval drones will seem indispensable if nothing else for deterrence.
A plausible next step would be, if not already done, to have a fleet of small but powerful naval drones that act as sea buoys to sweep the sea for submarines - this would have the potential to complete change submarine deployment strategy.
Especially for countries with massive borders, including maritime borders, a fleet of aerial and naval drones will seem indispensable if nothing else for deterrence.
[0]: https://www.cbsnews.com/news/drone-narco-sub-seized-first-ti...