Yep, and I refuse to use sites that look like this. Lovable built frontend/landing pages have a similar feel. Instant lost of trust and desire to try it out.
Would it be the case for folks who don't have any idea what Lovable is.
Familiar UI is similar to what Tailwind or Bootstrap offers, do they do something different to keep it fresh?
Average internet users/consumers are likely used to the default Shopify checkout.
The Stripe or Shopify checkout is familiar, but it only became familiar because it was well designed and people wanted to keep using it.
Also when its obvious someone used an LLM, it bleeds into my overall opinion of the product whether the product is good or not. I assume less effort was put into the project, which is probably a fair assumption.