> Is this related anything with the latest Mame memory problems with the gui ports ?
No. We've said all along that "gui ports" are a terrible idea for exactly this reason (and especially since MAMEUI doesn't have a team to debug this sort of stuff anymore). Frontends like EmuLoader and GameEx are in a much better place.
> Does this mean Aaron is no more in Mame ?
Quoting the post you replied to:
I do hope to continue working on modernizing the core, so we are not left with a half-finished effort.