The vast majority of Salesforce code is "legacy", so you don't get a lot of people sticking around that know modern web stuff. I saw the same thing happen at a

The vast majority of Salesforce code is "legacy", so you don't get a lot of people sticking around that know modern web stuff. I saw the same thing happen at a previous employer. Nobody that knew modern web development would stick around and let their skills rot, so our "new SPA" interface was build by a team that only knows jQuery