They actually are gaining market share dramatically among high traffic (big company) marketing sites: https://www.sitebuilderreport.com/state-of-website-builders/

Once static site generators + headless CMS's became all the rage among enterprise IT types, that opened the door to Webflow...since Webflow is basically a GUI-based static site generator + headless CMS.

If you ask the engineering team, they'll build the marketing site into a complicated monstrosity on Gatsby + Contentful, and then never allow you to touch it again. You'll need to go through them to make any changes--and they'll be busy with real product work.

If you build on Webflow, you're basically doing the same thing, but putting ownership of the marketing site squarely inside the marketing org (who likely has people who's time is less expensive able to do what you need in Webflow...and faster).

There's limitations for sure (eg. multi-lingual sites, nested directory URL structure, etc), but within a few years I'm guessing those will be solved and the adoption will be even more dramatic.

Although Webflow seems to be stupidly focusing on the whole "No code" Twitter circle-jerk with Logic/memberships, so they may get disrupted by Framer in the meantime however.

Maybe it depends on country but Webflow has massive adoption around here. Every agency is becoming webflow agency because they can teach their designers to create small to medium sized websites without coding. You can't create custom unique branded websites without coding with any other tool. It got to a point where clients themselves require webflow because it means easy, cheap, fast visual changes. Wix had to rush to create their Editor X which is direct Webflow competition.

Yes it won't replace big sites that require complex CMSes and publishing flows. But it certainly has a niche.

TBH i think it will be super interesting if somebody made some kind of more open webflow style html/css editor that could be integrated to current CMSes and workflows. Like sections of pages that are handcrafted like this. Or your header/footer and blog are CMS but landing page is this super visual html/cms editor.