Since CIG have spun off a new studio via Turbulent to work on planets, it seems some backers might now have the idea that spinning off studios to work on different parts of the game might be the way to go
robertsspaceindustries.com
I mean, the more that is outsourced to other studios maybe things will get better. As long as CIG communicate well with those studios, things like scale, so their isn't another illfonic.
What won't change is the amount of work required as long as the requirements remain the same.
The OP says this:
Well, it does depend a lot on how its managed and how many people they have working on it. But let's say they are right about how long. The only way to speed it up is to have more people on the job. Let's say they double the amount of people (usual caveat - mythical man month, etc), then that's still 5 years. How about 5x the number of staff? Great! 1 year!
Now you've done this, either as a separate studio or keeping it internal, now you have a load of employees you no longer need. Now what? Ok, you could outsource fully, so its not your problem, or contract, but that increases the hourly rate per employee. So increasing staff and rates, makes it all a lot more expensive.
Looking at what they are doing with Turbulent, you have to presume they have long term plans for this. You generally are not going to set up a new studio for just one year or two. CIG know the 110/100/90.... systems are going to take years to develop yet.

- Star Citizen Spectrum
I don't know how many specific ships have been released over the last 8 years but i believe it's around 50 unique ships and over 100 variants. None of these ships are finished, and all will have...

I mean, the more that is outsourced to other studios maybe things will get better. As long as CIG communicate well with those studios, things like scale, so their isn't another illfonic.
What won't change is the amount of work required as long as the requirements remain the same.
The OP says this:
I would be surprised if they managed to modernize 4 ships per year, at this rate it will take more than 10 years.
Well, it does depend a lot on how its managed and how many people they have working on it. But let's say they are right about how long. The only way to speed it up is to have more people on the job. Let's say they double the amount of people (usual caveat - mythical man month, etc), then that's still 5 years. How about 5x the number of staff? Great! 1 year!
Now you've done this, either as a separate studio or keeping it internal, now you have a load of employees you no longer need. Now what? Ok, you could outsource fully, so its not your problem, or contract, but that increases the hourly rate per employee. So increasing staff and rates, makes it all a lot more expensive.
Looking at what they are doing with Turbulent, you have to presume they have long term plans for this. You generally are not going to set up a new studio for just one year or two. CIG know the 110/100/90.... systems are going to take years to develop yet.