Next iterations will be very different since SLS and hopefully Starship will exist and be able to be used to launch: JWST was built the way it was partly becaus

Next iterations will be very different since SLS and hopefully Starship will exist and be able to be used to launch: JWST was built the way it was partly because it had to fit in the launch vehicle they knew was available. There's a future where we never do anything like it again because reusable rockets mean multiple launch orbital assembly is just plain cheaper.