I recently toured a new WeWork space in San Francisco. While beautiful, the price was absolutely bonkers. I say that in the context of a commercial real estate market that is booming in general.
For sure, that is an advantage. Lessors are also asking for huge deposits right now so not having to tie up a bunch of deposit cash is nice too.
Although this probably isn't applicable to many software startups, one downside of places like WeWork for my company is how they focus on selling space by the desk. In my business (videogames, including console) most developers have a desktop PC, two monitors, a TV, possibly a Wacom tablet, and multiple console dev kits on their desk. The "12 desk" office we were looking at with WeWork would comfortably fit 4-5 of us with our space needs. That made it a non-starter.