Tom is 40 or something old, right ? What really happens is .... simply is the traditional reality scenario of "time charging" catching .... lots of real life responsabilities to care about, so, no time anymore to dedicate to player career or whatever people call it these days when someone trying to be a pro level competitor in games ....
Besides, the current competitive level for fighting games is way much more demanding and hard today than 8-10 years ago .... no real motivation for older players to spending hours and money in trying to catch up with the new generation of players, that, for real, are better players than the old school dudes .... sad but true, yeah !
Of course his knowledge on fighting games, especially MK series, is very good and outstanding; the man is a living book about knowing regarding fighting games techniques and advancing topics about, no argument here about it.
Life is cruel, and ask for a lot of strategic choices and decisions ..... hehe