Mistral 3 has been in service since the middle of the 2010s, the one that got qualified a few days ago was an increment, namely the one MBDA calls “3rd step”, or as they’d say on the other side of the channel “Mistral 3 Mark 3” :
He changed “adding 1000 m/s to the speed” to “pushing the speed to 1000 m/s” basically, which doesn’t change a lot as it means the missile gets at least to 1000 m/s in 3.5 seconds in both sentences
Because it still has to fit certain range requirements. Say you have one missile with 50km range, and 5 seconds burntime. And then you invent another missile with 50km range but make the burntime 3 seconds, it still would have the same range just accelerates quicker although could also decelerate quicker in the tail-end of its range, but in the medium ranges or the ranges where it would be most useful, the time-to-target would decrease drastically.
Its possible though that the MICA’s dogfighting performance would be drastically impacted since it would no longer be able to thrust-vector for nearly 7 seconds, since thrust-vectoring relies on the missile burning.