Doubly corrected
At what point do you switch to aftermarket?
When you feel the need.... ;D
Only real limitation is AFM, you can change it to be MAP based but depends on ECU (year model etc).
Per gear boost control, launch control, AVCS control, water sprayer control, per gear rev limits, map switching the list goes on... retains factory self learn functions so will keep pushing for power until it detects knock and will scale itself back.
Also cheaper than buying a standalone ECU and then paying for tuning on top!