The exploits are released when they are patched. If they are patched faster, they get released earlier. Thus, you can assume that whenever an exploit is released, you cannot use it on the current firmware, so it is a wise choice to stay low. Just recently a bug (I wouldn't call it exploit) was released which was patched in 6.0 (but can't be used for anything), so it's not that nothing is released, but that the switch has strong security. While the deja vu exploit is useless in the current firmware, other exploits might pop up which make it usable again.
Also, fusee-gelee is not perfect as it is tethered. While SciresM thinks that we will probably not get any exploits any more, Nintendo might screw up on some firmware in the future and then we might get some exploit there.