This is one of those fantasies people have. You might as well hope to win the lottery.
Imagine being the only person who can play a extremely custom instrument. Unless someone absolutely needs you, you’ll be sitting and hoping to get a job. Worse, a company is more likely to hire some people to rebuild it rather than hope to find this unicorn who can do this.
Source: Been in the industry for 15yrs. I’m one of those guys you hire to migrate old software to a web app. And frequently, company will pay to modernize rather than support outdated tech every time.