When I see this, I suspect the vendor is operating under conditions that approach absolute chaos: dumping whatever junk someone imagines might be necessary into the stack with zero resistance, for years on end. Zero effort spent on any factoring that might threaten redundancy.
I think they've fixed this only a year ago or so.
On top of that, the "agile" mindset all too often also means there is no coherent vision where the project should go, which can and does lead to bad fundamental architecture decisions that need extensive and expensive workarounds later on.
And yes, there have been people describing exactly that in ASML [1], although the situation seems to have improved [2].
