With your logic most languages would have been dead by now. Python was created in 1991, Ruby in 1995, Erlang in 1986 and opened sourced in 1998. Just a few examples to consider. They took a lot more than 7 years until they peaked and gathered wide adoption.
Java 1.1. (JDK 1.1) (the first true full featured java) was released in 97. It was meant for applications such as midlets, but it was such a good language that took over in the web, and forced the hand of MSFT to create .Net.
By 2001, in just 5-6 years Java became the de-facto language of the Web Services (php, and python were relegated to smaller web pages).
What has Swift realized in 7 years? It failed in the web, and also in AI/ML framework. It is being used because you have to use it. While both Java and Python flourished everywhere because people wanted to use them as they were good languages.
In 2001 Java was far off from being "de-facto language of the Web Services". cgi was the dominant setup back then and php, and particularly perl was on the top list. Amazon ran on perl back then.
More importantly, your statements are clearly a selection bias to confirm your subjective conclusion. You're picking 1 language out of thousands to reassert your statements instead of taking a step back and rethink your conclusion.
