And relax.....
Read the original question.... before slagging off Boeing.
Take a breath, those above (here we go...)
The P-8 (*Poseidon) has a Speed Trim System. Not MCAS.
The Speed Trim is bourne out of the fact that it has a 737-900 wing (with a few additions) and an -800 body.
Noting to do with MCAS. This is freely available on Google.