Ok Patrick, I would like to congradulate you on reading wikipedia and quoting almost verbatim. Next time do some real homework, so you know that a compression truss of metal inside wood has been used in building since the inception of metals.( Se roman aquaduct construction). As for the neck reinforcement, most "classical" builders use graphite in their necks these days because Quartersawn wood is more costly than adding a $4 piece of graphite, so can the classical guitar crap, guitars are made as inexpensively as possible for maximum profit potential. As for the thick fretboard arguement, seperate fretboards were only employed on the most expensive guitars pre 1890 and as for extra thick fretboards, this was a building style generally attributed to the German and Austrian builders of the time. The Italians who were the preimminent musical builders used very thin boards and used a more triangular neck shape to keep their necks more stable in the warm seaside climates.
All of this notwithstanding, the question was about a bass guitar(not a classical guitar). With an ebony neck. You put an opinion out there without any reasoning as an absolute, and you cannot do that without trying to give the querry some representation of evidence. Just tossing an opinion without reason is like trying to feed a great white, sardines by hand and retaining all your digits.
Btw....when you were 5 yrs old, I was working at Gibson. So go easy with the feigned indignance. I wasn't belittling you, just wanted you to elaborate on your opinion...which I do agree with.
So you're saying that you are not aware that classical guitars have a huge fingerboard thickness when compared to any steel string instruments and most of them have been strung up with either nylon or gut strings which has nothing to do at all physically when it comes to tension - period
Most classical guitar maker of our days reinforce their necks with either a strip of ebony OR a strip of graphite because bow in a neck is inevitable under string tension.
The backbow your talking about after fretting will go away by itself in only a couple of days or months, but it will be gone...
Also if your expecting to make a living out of building guitars and shipping them all over the world, you must also consider climat change and moisture exchange differences which your little neck without any rod will never be able to face, reason why most classical makers use graphite inside the necks of our days
edit: a few notes about what you call truss rod:
and I shall add to this - and also a couple hundered years before 1908, the idea of neck reinforcement has been arround since the early lute days...