You're not giving the older generations of programmers enough credit here.
While it is true that strong typing is a requirement for the best performance (and this remains so), the productivity benefits of strong typing have been known for a long time.
I mean, just look at languages like C# and Java. These are well established, extremely popular languages, used mostly in business software. A domain where performance is rarely critical. Yet, these languages are very popular. Not in the least because they make it easier for programmers to understand and work with other people's code, and because they provide good tooling, both of which are hugely valuable in a business/enterprise context. Strong typing plays a major role in enabling these features.
Even when C# was still a brand new language, roughly 20 years ago, Visual Studio already provided features like "go to definition", "find references" and autocomplete out of the box. These were a major reason for people to adopt the language.
It's no surprise that people like Anders Hejlsberg, who created C#, later went on to create TypeScript. They already understood the productivity advantages of strong typing and wanted to bring those to the web.
While it is true that strong typing is a requirement for the best performance (and this remains so), the productivity benefits of strong typing have been known for a long time.
I mean, just look at languages like C# and Java. These are well established, extremely popular languages, used mostly in business software. A domain where performance is rarely critical. Yet, these languages are very popular. Not in the least because they make it easier for programmers to understand and work with other people's code, and because they provide good tooling, both of which are hugely valuable in a business/enterprise context. Strong typing plays a major role in enabling these features.
Even when C# was still a brand new language, roughly 20 years ago, Visual Studio already provided features like "go to definition", "find references" and autocomplete out of the box. These were a major reason for people to adopt the language.
It's no surprise that people like Anders Hejlsberg, who created C#, later went on to create TypeScript. They already understood the productivity advantages of strong typing and wanted to bring those to the web.