I mean it helped me muddle through a StrongSwan -> SonicWall configuration (never touched IPSec prior to that)
im sure if you go deep into the weeds on crypto it would prob fall flat
4.0 adds in the BrowserOP & WolframAlpha plugins ... so it fixes the issue w/ it not having up to date training data and math issues
you can still get it pretty stuck ... but it was pretty solid to start with and its only getting better
granted I have been in the IT industry for more than 10 years (damn, im getting old) and can tell when its bullshiting me most of the time ... but its a tool like anything else
prob amazing for red team if they didnt declaw the crap out of it when asking anything it flags as being in the "grey area" ... though this is prob for the best as it also declaws it for random script kiddys online too