Yep I think you can reasonably argue that immutability + strong conventions are the most important dimensions (as opposed to FP vs. OOP, as much as I like FP and dislike OOP):

Immutable by convention + Strong conventions: 91.3% - Elixir 97.5%, Kotlin 90.5%, Racket 88.9%, C# 88.4%

Immutable by convention + Fragmented: 78.4% - Scala 78.4% (n=1)

Mutable + Strong conventions: 77.5% - Ruby 81.0%, Swift 78.5%, Julia 78.5%, Dart 78.0%, Go 71.7%

Mutable + Fragmented: 67.9% - Java 80.9%, R 75.8%, C++ 75.8%, Shell 72.9%, Python 65.3%, Perl 64.5%, TS 61.3%, JS 60.9%, PHP 53.8%

(my grouping is somewhat subjective)