Welcome. I too lurked for a number of years before joining this forum. Your post was interesting to me since a number of things you mentioned, reminded me of when I was your age. I was in my mid 30's when I switched from one mega corp to another after 10+ years of service. I had no debt at the time except for a home loan and my net worth was probably about the same as yours based on your input and inflation adjusted. The DW had recently stopped working to raise our child. (although she never went back to work for a "$ paying" job.
I stayed with mega corp #2 for another 25+ years before retiring. I started saving in mega corp's 401k as soon as I could and I always put in enough to get the max company matching. The last 15 years I maxed out the 401k to the legal limits for tax deferrals. That along with IRA's and other savings and investments, WORKED FOR ME. Now the biggest financial problems facing me are RMD's some years in the future when I hit 70.5.