What's the evidence for this? I've run a UK company, albeit a decade or more ago. Fees are negligible. There's a £34 annual filing fee. You might choose to pay accountants to prepare and file your accounts for you, but presumably if you were to do so you would do the same in the Caymans.
This editorial on Delaware corporations? https://a16z.com/were-leaving-delaware-and-we-think-you-shou...
Another view, https://handbooks.clerky.com/startup-incorporation/where
Delaware is widely regarded as having strong protections against personal liability for corporations. Some advisors say Nevada has better protection against personal liability. This is arguably true, but the differences are very unlikely to be relevant to founders trying to build a legitimate business. Some people have also observed that Nevada has an adverse selection problem in that their unusually strong protections attract bad actors. As a result, it's possible that if you incorporate in Nevada, you'll be inviting closer scrutiny.