Friend of mine works in tech for a large company in downtown SF as an engineer. She is able to work from wherever and frequently goes to the library dressed! Lol. We have talked about her going into the office and she claims that she could with no issues and knows of 2 people who are transitioning at her company. She has no plans to transition so I don't think she plans on ever going in dressed but I think it's great that there are people transitioning there with no problems.
I think the demand for engineers in the valley is so great right now, if you have talent most big companies don't care how their non- customer facing employees dress.
