Do Thai VT-4 have round counter for the main gun? After all, pretty much all of its FCS appears to be digital, so integrating that sensor shouldn't be too much of a problem.
That would at least help remind the crew that they're supposed to change their barrel when it nears its lifespan.
Also, I want to revisit whether the 125mm gun has a firing rate limit for rapid fire, just like in 155mm SPGs. Especially with the video of Thai crews using their tanks as direct fire SPG.
If the gun has a firing rate limit and it wasn't communicated to the crew, there's a good chance the crew unknowingly exceeded the limit, which then caused a blown barrel.