Not OP, but one example I can think of: Jeff Bezos moved from Washington state to Florida two years after Washington enacted a 7% capital gains tax "on the sale or exchange of long-term capital assets such as stocks, bonds, business interests, or other investments and tangible assets"[1] which "reportedly helped him save $1 billion in taxes."[2]
There's plenty of studies on this. There's unsurprisingly a modest but statistically significant migration of millionaires from high-tax to low-tax jurisdictions.
[1]: https://dor.wa.gov/taxes-rates/other-taxes/capital-gains-tax
[2]: https://finance.yahoo.com/news/jeff-bezos-moved-florida-impa...