The Networker fleet has never really been valued by successive operators. One wonders if the replacement fleet will be left to rot in the same way. The 376s are the same.
I tend to agree that it’s unfortunate to be scrapping trains that are barely 30 years old. Another example of the mess that has been rolling stock procurement over the last decade or so.
While this could have been handled much better, the biggest problems I'd say have been a botched rolling electrification programme combined with setting goals that have no concrete plans behind their delivery - the goal of removing all diesel stock from the network by 2040 being the chief case here. The goal in itself is fine and I think necessary and beneficial, but the action behind it is well short. Insufficient electrification combined with this target, has left diesel fleets going on beyond their intended lifespan while EMUs are stored/scrapped short of their intended lifespan.
In the case of Southeastern, their rolling stock problem is largely down the repeated short-term contract extension seen pre-covid. If in 2014, or 2018, a new long term contract was awarded to either Govia or a new operator (preferably the latter given Govia's record), a new fleet would likely have been ordered, and/or the existing fleet received much better attention. But there was no incentive to do new fleet orders and limited the incentive to do TLC on the existing fleets when only months of franchise operation were guaranteed. With the exception of the 375 mid-life refurb, Southeastern only did what the law required them to do in PRM requirements, and even then the 466s got a derogation to limit what was done to them. Now Southeastern are reliant on receiving other operator's microfleets (707s and 377s) to chip away at their ageing fleet while a full replacement tender drags its heels. Still, could be worse, they could be SWR...