You can use it. YSmenu lets you browse the entire filesystem instead of just listing every .nds it finds like the original kernel. It will also fix Okamiden and maybe some other games the original kernel can't play for some reason. But it will break Pokemon BW(2). And can't use RTS with it.I've got an R4 SDHC RTS Lite 2017 flashcart with the kernel from r4isdhc.com, based on your compatibilty list, similar cards from earlier years work but I was wondering if it would work on my newer 2017 card from the same place as the ones from previous years that do work, and what would the advantage be to using this over the kernel provided by said site?