Yes, if you have homebrew. It took me a few minutes to do it on my sister's 2DS....In the fifth issue, we can just install Boot9Strap without installing arm9loaderhax before while being in <11.3 I think.
11.3 doesn't need a hardmod, it uses SafeHax.That is absolutely true, but from my experience, it's been easier to go through a9lh then to boot9strap, than to go through a hardmod or dsiwarehax. Unless, of course, you already have dsiwarehax or a hardmod working beforhand.