You’re missing a lot of the details explained in the article: this isn’t something like a predictable 2% tax but something which fails significantly at unknown intervals when a bad storm hits, or when infrastructure is overwhelmed and goes from functional to unusable all at once. That leads to highly correlated failures on a large scale: everyone in your zip code can’t get insurance, the entire city needs key infrastructure replaced at the same time, etc. and those also affect the desirability of the area and its ability to attract businesses, tourism, etc. That’s a recipe for volatility and in many cases the potential savings on property values are going to be significantly canceled by higher taxes to pay for all of that infrastructure and increased maintenance costs.
Investing includes risk management. You can discount the abrupt disruptions into the price. Everything you say reduces the value of the property. Eventually large areas will be abandoned but until that happens people can live there.
But as I said, until that happens people will live, property values will decrease and stuff that is rebuild will be build cheaper.
What will most likely happen first is "climate centrification" within Miami. Poor people in high elevations will be move out when land value increases. Low elevation areas become new low income neighborhoods.
People who rent or live in cheap property just move and other people come in. Property values change gentrification happens but that's usual for a big city.
If you move to Miami now and have children, you can raise them in next 20 years and move elsewhere in next 30 years.
Sadly the idea that price alone affects desirability is a little niave.
That being said, I wouldn’t be surprised if people with too much money start buying just to have bragging rights on a magnificent view of the sea level rise.
Those are not counterarguments. Increasing running costs directly decrease property values. The property value vs. replacement property value will adjust.
Consider normal case whre property price is $1M, upkeep an maintenance etc. cost is $10k per year and investor gets $70k in rent.
Now change it to property price being $100k, yearly cost $30k per year and investor gets $60k in rent.
Witch one has better ROI?
After discounting property values, Miami will be cheaper place to live in the future and that means that it may attract even more people.