All the TDs?
The M10 is mobile. The Firefly has a turret and enough mobility and tulips. Honourable mentiones to the Puma and Panther as mobile vehicle hunters, if not proper TDs.
The vulnerable to rushes part is purely for fixed casemate TDs like the SU85 and JgPz IV and StuG.
What they are all actually vulnerable to is infantry, for which they have zero response. And the jackson is as weak there as any other TD.
while the firefly DOES have a turret, its rotation is slow, as is its overall speed making maginaly better than a case mate at fighting against a rush.an unsupported firefly is as dead as an unsupported su85 or jp4
similar but different, a puma wont be bouncing any shots, and absolutely does not have the health to slug it out while fleeing. furthermore, the puma's accuracy is unreliable at the best of time, let alone on retreat fighting for itsl life...
panther i guess would be the lone exception, but many would argue that its a medium tank with an AT focus rather than a proper TD due to its acceptable AI performance due to its mgs
additionally, one of the unspoken advantages of the jackson is that its so good at AT that its usually all you need, so focusing you infantry as AI is perfectly serviceable, which eats up the jacksons vulnerability to infantry. you could say that shreks are a threat, but requiring 3 volleys combined with its mobility requires you to play against helen keller to actually kill a jackson with infantry AT
infantry isnt a realistic option anymore than any other TD- all of which have a PROPER exploitable weakness like mobility or case mate design or health pool. jackson has all the tools it had to survive being actually fragile, meaning anyone that was able to make use of them then has nothing but breathing room now that it is as forgiving as anything without out literally any draw backs
i dont consider myself biased by any means, and can say that with earnest, but the when using the jackson you have to fuck up to lose one, not be out played because it is so forgiving and that is the problem.the level required to kill one vastly exceeded the power it brings to the field as well as what it takes to kill one. its like killing any tank,, but with 50% more range meaning it should be clear of snares and more mobility than most meaning... well fuck you basicly....