Yes -- Wix (who misused GPL WP code) and Squarespace. But also, on the WooCommerce side, Shopify and BigCartel.
The other thing is that really at this point block editors are everywhere; they are in every email marketing tool, they are in some social media sites, they are in other CMSes.
A block editor isn't optional at this point. Nor is block layout editing.
And pointing at a million people who install a plugin to keep the classic editor functionality is not the same as pointing at a million people who don't want Gutenberg.
It's pointing at a million people who have a variety of reasons not to upgrade older existing content to blocks, but who still need to edit that content (e.g. complex/ill-advised shortcode setups, specific markup etc.)
(The Classic Editor plugin is not either/or -- you can decide to use it per post or per user.)
Do these users have a choice? e.g. export their data and use it on a self-hosted instance or another provider that wants to offer something akin the previous wordpress.com? TFA didn't cover this aspect.
