Got offer from HR yesterday, for M3 position, I am mid 40s, 17+ years experience in electronics. Package is around 9.2k per month, 2-3 months bonus annually. I find the overall package is rather mediocre but I heard it is a good place for retirement and I am few years away from my 50s so want to "settle down" so to speak. I heard ST environment quite relax one? I'm willing to trade off my future potential for this iron rice bowl.

Curious if anyone know if I work here till I am in my late 50s, will I have any shot of being promoted to M4? I am leaning towards accepting this offer due to stability offered. Should I counteroffer slightly higher? Anyone know the range for M3?