Well, all very interesting, however, there never has been anything wrong with updating manufacturing techniques and processing. Many of the old out of the box rifles couldn't pull together 1" MOA groups with factory ammo and becuase propellant development was slower in catching up, although improvement could be found, it wasn't necessarily spectacular.
These 'Modern day cost saving ideals' have and do produce rifles that will readily shoot sub MOA groups out of the box and have excellent 'Lock' times. So no disadvantage to the poor old hard done to punter there then!
Besides which, all the same manufacturing cost and production processes are applied whether barrels are long or short. So it's no good going on about all that old history engineering when modern manufacturing works better and with lower costs.
Also, Mannlicher-Schoenauer/Steyr-Mannlicher & others have made short barrelled 'Stutzen' rifles for pushing 100 years in various calibres, with the switch from old to new techniques only causing minor problems and these, associated with metal to wood fitting rather than the barrel/action/trigger.
Winchester, Rem, Mauser, & Mannlicher-Schoenauer who produced some very finely engineered rifles, among others of their day, made weapons that had inherrent headspacing problems for handloaders. They simply hadn't allowed for the fact that reloading may become as popular as it has, therefore assumed a 'Once only' cartridge firing.
I have owned many rifles with long and short barrels, but have always preferred the advantages short barrelled rifles offer and have never felt 'Under-gunned'. Doesn't mean I don't like long barrels..it's just my preference.
The .25-06Rem, a wildcat for many years was originally put together as a varmint gun to utilise lighter weight bullets. As a flat shooting rifle, it's great and certainly generates velocity with a 100gn bullet in my short barrelled rifle. That's more than enough for doing everything I want in the UK.
I have not found a recipe that stabilises a bullet weight heavier than 110gns in my rifle and have no wish to do so. The Sierra #1620 Prohunter works just fine and puts down Sika and Red stags easily and I'm sure there are others out there achieving the same result, whether they have long or short barrels on their rifles.
Check out Mike Dickinson who on Sunday morning put together a sweet 1/8" MOA one hole group at Calton Moor Range with my rifle, ask him whether short barrels are in any way inferior with modern cost saving manufacturing.