This is about 90%+ of people who will not do that. Which is possibly the majority of desktop web browser users. Especially if any of the Blink wrapper browsers follow suit.
What was the purpose of using your SSNs as ID rather than names? Very interesting I didn’t realize scientists wore uniforms with names/ids across the back like baseball or hockey players.
Names aren't necessarily unique. It's not hard to imagine a large enough organization having multiple John Smiths on staff, for instance.
As personnel management became more sophisticated and formalized, a unique identifier was needed that was guaranteed to refer to one and only one person. And since SSNs already existed and were guaranteed unique, most of them just used those rather than inventing a unique identifier of their own.
I've interviewed and hired hundreds of talented technical people and would look favorably on a candidate that said they had concerns on the financial viability of the company, and that the viability concerns were not related to anything they could influence, such as product or service quality, and so leaving was the best option.