It's been over a decade since I had so much as a semi-private office (shared with just one quiet teammate) so I have to say the death of the open office is exaggerated. And all of their workarounds assume a laptop could ever substitute for a desktop with an ergonomic keyboard and a large screen. It's amazing that the escalating competition in pay and perks never seem to include space to get into the zone.
A tech company in a prosperous city can buy you all the 4k Dell Ultrasharps and Macbook Pros a person could want without breaking a sweat. Another couple feet of desk, on the other hand, could turn you from a net creator of value to a net destroyer of value. It's as unaffordable to the company as the salary bump that could put homeownership within reach.
I'd love it if someone would offer me a private office, parking space, and ability to live in a market with closer to median home prices, but the industry is very clearly trending in the opposite direction.