Probably for the same reasons most of our desktop applications have become slow Chromium instances consuming multiple GBs of RAM, each:
It’s cheaper to hire developers, and quicker to ship software. The user experience be damned.
It’s cheaper to hire developers, and quicker to ship software. The user experience be damned.
Of course they would pass that along to the consumer, but nobody is going to pay token-based pricing for something that used to be free and ad-supported, or a cheap monthly subscription.
The second one it's much, much faster.
Nowadays you hire a developer that can use Claude or Cursor out whatever and they will use any language. There are no expensive Rust developers anymore. Or even JavaScript ones.