O D wrote:

Can some of you people that work with this kind of tools for a living ,
please tell me the advantage of this saw stop saw for about $3,000.?

Tiny.

If you want to spend some money to upgrade safety, a quickly removable
and replaceable crown guard and a riving knife will give you nearly as
much safety for a whole lot less money.

OTOH, they're not bad saws or badly priced if you're buying a new saw
of similar quality.