Exploits exist for 3.0.1-4.1.0, but with Fusée Gelée being released this summer for all system versions (pre-hardware revision), there isn't any need to consume this exploit. In other words, future Switch systems will still be exploitable or partially exploitable by the aforementioned exploits, so there's no reason to let Nintendo study them and patch them completely.
Edit: It has been noted that the aforementioned exploits might be used to play around with newer Switch systems that come out post-hardware revision, for example.
The "hardmod" that Fusée Gelée will require on 3.0.1+ is allegedly very easy to perform and shouldn't worry you. If you want to wait an indeterminate amount of time after Fusée Gelée is released to the public, the software exploits for 4.1 will eventually be released. However, it probably won't be worth the wait.