You can boot your switch with hekate. One of the tools wit that will allow you view the burned fuses. As a note, with 2.4 right now there is an issue booting other payloads.How you checked for them?
There is really no reason to keep them separate right now. Some people are still holding out in case there are any mods or hacks that come out that for whatever reason need a lower firmware. If you are not worried about that you can just update and burn the fuses. It's more of a personal preference to not burn them.thanks for the answer, i'm new in this. So i don't want to mess it up or make something wrong.