While this is very likely to become possible in near future (say… 25 years, 50 years), the technology for full dive is very likely to be immediately banned.
Full dive require ability to override users’s perception WHILE suppressing some functions, which pretty much means hijacking most of the inputs/outputs that goes through your brain, and if someone finds a way to do that without surgery, the thing will instantly move into military sector. Simply because that kind of tech will provide easy way to kill people. If you can stop full dive user from actually moving limbs while inside VR, then the same tech with slight modifications can stop their lungs instead, and if it can be converted for ranged use, it’ll be very ugly.
Implant based solution will trigger some transhumanism issues (highlighted in Deus Ex), but it’ll be pretty much the same thing - it’ll be very easy to kill people with it. If it is network-connected, someone will hack it and stop your heart “for the lulz”.
In other words, arguably cool in theory, most likely will be achievable in near future, but most likely will not be available for civilian or consumer use.