To add to this, imagine: you WILL have to maintain ANOTHER ship.
How will you leave it floating there when you go into bases? Will it just vanish?
You will have to begin from 0 again. Alongside the Railjack, you will have to farm things for the fighters. While you can start to farm AW mods and weapons in the early game in the (very limiting, though) Archwing missions after you complete Mar's Junction.
In the end:
Another thing to grind.
Another isolated system when Archwing is being implemented in parts in the rest of the game since PoE.
Another thing to maintain.
Another thing that will join the Rendundant Departament of Redundancial Redundancy when we already have Archwings which will get tweaked in the future. (Or just nerf. Because Scott never says "Tweak" or "buff", only "Nerf". What? He said those two other words when he spoke on AW changes? Are you drunk? I WILL SMOKE THAT BEER!)
Another thing for the devs to focus on top of everything else.
Oh, btw, going back to the point above: .Does that mean they will abandom AW? Because fighters will surely make them irrelevant. Another system that was left in the dust for the new one even though it will be used only in Railjack at the start, just like AW had its own isolated missions in the begining. Maybe in the next half-decade it will be in the same level of implementation AW currently is.