I was able to hack mine(though I don't use it much anyway) fairly easily. My brother did it to his so he could dump DS carts onto the SD card for better portability.
I suspect 3DS hacking community will stay active for long time as it's the only cheap (second hand 2DS), wide spreaded, hacked portable console available.
Indeed, I know some hacks were being held back until end-of-life. For example the author of SoundHax (one of the most important tools in 3DS hacking) said he was holding something off: https://twitter.com/nedwilliamson/status/874594459744423936
However this all assumes that updates will stop, and I'm not so sure that Nintendo would even announce such a thing.
EDIT: I'm already aware that the system has been exploited to death and back, so I'm mostly curious if people haven't already dumped everything.