yes the very nature of a chain cannon, makes electronic priming,the easier way to go.
so far we can still go to the store with 20$ and come back with a 200pk of 209s, someday that might be not so easy, and electronic is the better/only way.
when you have a chain cannon rof 100 rnds per second, it gets intense.
a spark discharge solves a lot of kinetic issues with engineering the mechanism and its timing.
For chemical primers there is a non-trivial lag between the trigger breaking and the firing pin being accelerated to sufficient velocity such that it ignites the primer. The mechanics of maximizing acceleration of the firing pin is adversarial to durability, reliability, and precision in a number of respects. In automatic weapons it is made worse because the same physics must run in reverse to support the desired rate of fire.
With electronic primers, you mostly only need to worry about switching electric power fast enough (trivial). The relatively fragile firing pin mechanics don't need to exist. But you do need electronics, which has its own issues.
It is a mature technology. The main issue is cost and simplicity, since it often requires adding electronics to weapons that normally would not require them. The military uses electronically primed cartridges for things like chain guns and autocannons, since those require electronics to fire regardless of how it is primed.