Miami isn't even a blip on the "where people are going" radar statistically, but the hype and anecdotes could always make it a reality long-term. I have my doubts, personally.
[1] https://www.sfchronicle.com/bayarea/article/People-are-leavi...
[1] https://www.forbes.com/sites/jackkelly/2021/01/26/forget-abo...
[2] https://www.nbcnews.com/business/business-news/tech-flight-w...
[3] https://news.crunchbase.com/news/why-miami-is-the-next-hot-t...
[4] https://www.wired.com/story/miami-mayor-woos-techies-what-do...
[5] https://www.foxbusiness.com/technology/miami-mayor-pushes-si...
Further, look at real estate prices for the area. The markers are there, just need to look for it.
The links you provided are 5 opinion pieces that don't even try to quantify anything (seriously, I don't see any actual data points in any of them), with a few of them seeming to just be blatant PR placements by Suarez. That's not a bad move, to be clear, it's really savvy! Just objectively not proof of anything except exactly what you were replying to: hype and anecdotes.
Again, the Miami migration could totally happen and/or be happening! But I haven't seen any data that currently supports that, and until I do I remain skeptical that it's much more than loud Twitter voices and a shrewd Mayor.