Weight weenie bike on a budget, this should be interesting

Lighter parts are mostly not less stiff or less durable....the are just (much) more pricey. So if your Not 90+ kg fatass, its all good :) investing in aero stiff is fucking useless (exept for Track)....like you go 40km/h avarage in the City......

That's rubbish. You only see less failures because there's less weight weenie parts in circulation.

You have no clue. Aerodynamic benefit occurs at ALL speeds.