I really liked Shopify's remote model of not closing offices, but turning them into "ports" for teams in major cities to get together throughout the year for planning, team building, and retreats. You had an official place to get together, enjoy the perks of tech company offices, but with the intention of deep short bursts of interaction rather than focused work.
We have done the same at Zendesk. We've reduced our office footprint but have kept our hubs open with large enough offices open for the occasional large on-site and for easier team collaborations, as well as space for anyone that prefers to work in an office environment. I like the model, but I question long term economic viability of owning that much office space with mostly low utilization and only occasional spike…
It didn't really take off afaik, but with more bigger and stable tenants making a larger bulk of these it might actually take off a bit as a model.