It almost certainly won't be vulnerable to existing exploits. Fusee-gelee started being patched on units shipped in 2018, and it's very likely going to be released with 8.0.0 or higher, which excludes Deja Vu. There are no other exploits in the pipeline.
Nintendo also did a great job with security, and I can't understate how daunting finding a new exploit is. SciresM, an authority on the subject, thinks patched systems on 8.1.0 "probably" won't ever be hackable.
In summary, new systems on 8.0.0+ probably won't be hacked for years, if ever.