Until that switch happens, it cannot abandon TMG. IT means Intel has to run a parallel design effort for a long time, as older existing products go through steppings and tweaks, while keeping TMG alive in case the second design team cannot make things work with TSMC tools.
One of the posts is right - TMG doesnt have a lot of market value with its tools and process, and hasn't proved it can be a viable foundry. This really means that Intel turns into a fabless semi company. which has to make the board choke.
This is why Swan is still in charge to keep the ship afloat and sailing toward the icebergs. Maybe the thing to do is create a fabless company with Intel architecture IP to design on TSMC. That would make INTC crash, since it's essentially a vote of no confidence in TMG.
BTW, Harvard Business School could never understand this.