Seems HN is does not have expertise in this and who holds the cards in the current market in SF. The lease previously negotiated by the past regime has little relevance as Twitter is currently occupying less than 50% of the floor space. The landlord has to either accept lower payment, or look for a new tenant and Twitter moves to Austin. Given the current environment in SF, it's likely a new tenant won't be found for…
That's cool. That doesn't excuse squatting, and a good faith effort requires reconvening at the negotiating table to formulate new terms; not just ghosting and coasting until the landlord engages in litigation, or holding somebody else over a barrel.
Landlords have to take a hard line. They negotiate with a tenant and then the whole building stops paying rent the next week.
The same thing is happening in retail as offices. Rents are, mostly, way higher than the market and landlords are quite happy for that to continue. Eventually the market is going to crack, I think everyone has acknowledged that...but landlords aren't going to be the ones to crack it themselves.