Only if they promise not to try to detect atmosphere, otherwise it's not a con because it will affect both.
emunand is great because there are no traces of what SX OS is doing, I suspect TX will implement emunand when they can.
The SDXC update is incorrectly named. You don't need an update to use SDXC as long as you format it to FAT32, you need an update to use an SDHC that has been formatted to exFAT. It's just that by default SDXC larger than 32mb are formatted to exFAT. Microsoft have patents on exFAT and you have to pay a license fee. Nintendo are avoiding paying the license fee for every switch sold. They may even save money if everyone installs it, because it's not included in the switch that they sell and they aren't selling the exFAT update (but finding exFAT licensing terms is hard).
The tobacco industry used the same argument for why tobacco doesn't cause cancer, ie it makes no sense to sell people a product that kills them because they would stop buying it when they died. But it ignores the companies make a lot of money before the person dies and even when people start dying, new customers still keep buying.
. the sx OS is just patching sysnand on boot, if you uninstall autorcm(its optional you know) your console goes back to normal, if you didnt install autocrm just reboot and your are good
