The problem domain has become quite complex. Many people are complaining that developers are "complicating" front-end development but it's the other way around.

The problem domain has become quite complex. Many people are complaining that developers are "complicating" front-end development but it's the other way around. HTML has become complex to account for new features that users want. So did CSS (which makes you rely on SASS) and so did JavaScript (and now you complex apps require a strong-typed language like TypeScript). A few years ago, HTTPS was used by prominent websites only. Now, it's required for even the simplest website. Implementing HTTPS can be simple (if you use Cloudflare) or a bit complex. (if you are running Nginx). But the complexity level did definitively increase.