0.96s translates to 10.42m/s (and … 0.98s = 10.20m/s). If you can manage 10.4m/s and 10.2m/s at the board, there’s already the possibility to pop an 8m jump. I believe Voloshin (better known as a triple jumper) has done 8.09 from 10.1m/s and Starks 8.25 from 10.3m/s. Fausto somewhere in between with 8.13 from 10.2m/s.
Of course, those are board speeds and not what they were capable of doing merely sprinting. I suppose there ought to be at least 0.2m/s in “reserve”, so that you can actually control the speed at the board. But you have to be comfortable at that speed, only then can you control your positioning. With ‘comfortability’ and ‘control’ I mean something of a visceral sense of effortless running. I think sprinting is a good way to expand one’s comfort zone.
The problem I’ve often seen with athletes who have tried hard to improved their max speed is that the have also tried to bring that same speed increase into jumping straight away, often without success (at least in the short term). Although they are potentially faster that before, they still struggle- sometimes even more than before- because they can’t allow themselves to gain control first. They simply want to too much speed-wise, thus they still struggle, only at higher speeds than before. Mentally it can be very tricky.