Netcode for fighting games have very cut-throat requirements for fair-play, especially the one talked about here being a traditional button fighter, as every single frame is an advantage. With the older titles like this one, and development takes years, back then cross-platform was likely too difficult as fighting game netcode is already difficult to keep fair and consistent with any latency. Unless a game is developed solely with the intent to support many platforms, re-doing the netcode is possibly nearly too tedious of a task then just working on a new title . Though all are mostly peer-to-peer code, but the complexities of it all still scales by requirement of precision. Having room for interpolation and having to need nearly 0 scales tremendously, in the end its a different ballpark.

Its really not just about money, games that get made are always made by real people even if published by a greedy company. If something is too hard to do, it probably will get neglected in favor of something more important. The interview does say “It’s bad, but keep at it” is how what they want to receive to, really just gotta know its far more complex and tedious than something you fix just by knowing its an issue.