> I used to be the outsider asking the big companies, and their silence would drive me nuts. Do they not know about this technology? Why wouldn't they use it?...I finally get it now having seen it from the other side. They are usually well aware of various technologies but have reasons not to use them which they usually won't share.

I can't speak for the OP, but this insight often just comes with experience and rarely needs seeing it "from the other side".

With some exceptions, the reality is that most technologies aren't introducing a new class of tool.

They're not contributing a wrench to a world that had only seen hammers and screwdrivers, let alone a power drill or industrial crane. The innovations they contribute are more incremental than a lot of early-career developers realize: they're a wrench with a more ergonomic handle, or a hammer with a claw on the back. They're a power drill with a simpler way to change bits.

If your organization already knows how to do its job with some other style of wrench or hammer or power drill, there are many reasons you might pick some new one, but few reasons you should pick any particular one at any particular time.

Articulating an answer to "buy why not?" is usually just an exercise you perform for the benefit of juniors, outsiders, marketers, evangelists and people who happened to be used to that tool already.