I witnessed a Webflow to wordpress migration recently. The main reason - Webflow is unnecessary for most startups.
I'm all for WordPress and with their latest update of full site editing or FSE as they call it (still beta), it's all you need.
The main limitation of WordPress for me was -- lack of site customization. What the theme has set, was all you could get without code. That is no longer an issue now.
+ No limits to CMS items, pages, visits per month, or cost based on visits and CMS items. I do a lot of programmatic SEO and the limited CMS items would've gotten used up PRETTYYYYY quickly.