He's hedging his bets by not paying rent for Twitter's offices.
If I were to refuse to pay my rent. My landlord would post an eviction notice and if I refused to comply, I would likely be arrested or forcibly removed.
Why can’t the landlord “evict” twitter? Does the process look significantly different for commercial real estate? Does twitter provide value to the landlord in some form other than rent? Maybe they’re afraid of bad PR?
The reason this wouldn’t apply to you is that residential real estate vacancies are usually easy to fill, especially nowadays.
That remains to be established. People often have no idea what renter protections are like. If he's in California, he might find that he can't be evicted without the landlord going through a multi-year process.