mmm maybe you missed the point, you are the develloper of FBneo, of course you are trying to always improve and fixing issue, even if it involve performance, and as you said fbneo is an emulator for desktop computer... here i was speaking to the developpers of recalbox, especially about the Rpi package.
So let me go in angry mode too:
First i live in cambodia and y average salary is 600$ which is far above the average salary already, so please come back in consideration what could 35$ represent with this new ratio.
And second why i couldnt address this issue to RB developers? it is up to them to include the last iteration of FB, but also as they still include old mame version or even FBA2x in regard to less powerfull pi owner, why couldnt they keep both version of FB the 0.39 and the 0.44, knowingthat we cannot use any versus fighting CPS3 game without crackling sound and less than 60 fps as long as we cannot afford at least the pi3b+ (which by the way since the release of pi4 became more aound 55$ nowadays) with the last available RB version ???
angry mode off
by the way i managed to roll back to FBa .39 as mentionned earlier, and now i can play again all my games at 60 fps , perfect sound, still working even with the last retroarch version and new menu.... i woul have prefered to have the choice to select for each game the core version, because to acheive that without too musch hassle i have to replace the fbneo core with the old one but with same name, meaning all my neo geo roms have to be re tweaked with my personal option. but i am happy with it now, just thinking of all other people facing the same problem....