Regarding modifying OEM parts/materials, in my case vintage (Infinity Quantum 2): still undecided between
"they know better than me what is good" (here: tiny thin cheap internal wiring) or "it can't truly be cost that they chose those cheapo wires so don't mess with it"
and
"it can't be good to chase the signal through those horrible wires"
I get the 'cost' part for mass produced speakers.
But the more the price of a speaker deviates from the cost based price function (the material cost of a $100,000 speaker is maybe 10% of the sales price, the rest is eaten up by profit, sales/marketing/demos, development, customer service/support/warranty), the lower is the motivation to use lesser parts for cost reasons.