I updated to 5.0.0. Remember the Wiikey team? they said they had a modchip for the wiiu, but then it never got released.
Now as for TX they are going off a hardware exploit. Nintendo has changes the console physically now and is producing the new version of the switch to most likely combat it. in other words a hardware exploit is possible and most likely real and can not be patched. I'm not saying to update.
in the 5.0.0 they added a randomizer into the kernel address so softmodding (free) is virtually impossible unless someone cracks the algorithm for it, which from what I understand, has only been done once, but not anything console related because you cant brute force a randomizer.
to sum it up in theory
Softmod < 5.0.0
Hardmod > 5.0.0 > New switch revision
As for this.
Not true all you have to do is get the address to the download from the server via network sniffing tools the download using packet and such.