I used to love LESS but it was not widely used, so moved to SASS/SCSS.
Then in the current project, to remove the dependency form node-gyp as SCSS uses those system bindings, we moved to PostCSS. With this removal, the fresh npm install time will reduce drastically.
The migration to SCSS to CSS is still going on but I like PostCSS as it keeps me close to CSS.
Similar are the reasons for me to prefer to React with JS over other Frameworks with or without TS.