If you sprint more you seem to get better at it in my own experience.
I'm a lot slower now than I was 20 years ago - spent 17 years doing literally no sport prior to 2019 so the last 3 years have been starting over again which has been tough at times as someone in his 50's. I am short so relatively 'heavy' at 65kg and hold 1013w for 10s. I'll be around 62/63kg for my next race and should have the same sprint power so w/kg will be a little better. I've always been a 'punchy' type rider leaning more towards endurance - so road racing rather than track. Of course, power is only one metric, there are others that help define the fastest sprinters.
I do all types of intervals but sprinting is my favourite. Earlier this year I beat a certain Mr Slik of Unbound Gravel fame in 2/3 sprints during Winter training when he was here. Next week a friend of his who has recently retired from Pro racing is over and was a sprinter so that'll be interesting - and good training.
