[mcguyver]

With an upgraded hop-up and motor, which I used to do, the PTW is rock-solid in performance and durability. This is tempered though by the fact that the PTW is an electronics-driven gun, and you don't want to go swimming with it. But, if you are spending big dollars upgrading an AEG, you'd be looking a Triggermaster or similar drive system, then same drawback applies. You can also use real uppers that no AEG can use, as well CNC billet lowers are available for the PTW.

You can make an AEG as accurate as a PTW.

You can have quick-change velocity feature in an some AEGs, same as a PTW.

You can make an AEG shoot as hot as a PTW.

You can make an AEG as miserly on battery power as a PTW.

But you can't make an AEG do all the things a PTW does at the same time for any money. And you will give up real dimensions and balance, as well as bolt-stop feature and real accessory compatibility across the board.

It is very easy to spend $5K on a PTW, about as easy as spending $5K pimping out an AR actually.