RacingRodent
Consul
The linothorax may have been fine against bronze weapons, but by the time of the Romans - at least the by the Punic wars - most weapons were made of iron. While the linothorax could still stop arrows, it was likely no match for an iron sword or axe.
I am going to strongly disagree. Ordinary winter clothing provides a surprisingly high degree of resistance to sharpened steel swords. Further bronze swords lent themselves to leaf shaped blades which are ridiculously good cutters and can deliver a thrust with prejudice. The issues with bronze was that it was far more expensive than haphazardly carbonised iron aka the kind of primitive steel available and that it does not hold an edge for as long.
Ironworking has steadily improved but it would be some time before the available iron (actually in service a rather poorly understood steel) could truly be said to be harder than bronze (but note hardness is not all you want from a sword or spear tip metal).
As far as I can tell linothorax went out of fashion because they were relatively hard work to make and mail became progressively cheaper or at least more available. However there are going to be big gaps in the linothorax archaeology because it is a biodegradable material so we may never truly know for how long they should keep turning up.