Anybody working with salesforce? Is it worth learning?

Apex = Java.features.retainAll(c#.features).stream().filter(feature -> feature.isBad()).collect(Collectors.toList())

Sums it up pretty well.

Though I have to say working with heroku is actually pretty nice.

Salesforce, ServiceNow and GCP these are the out of the box cloud platform providers with a huge number of high profile customers and still growing.
So as long as you learn any of these well, you'll always have a good paying job in these companies or their customers.

Also to mention, learn application development on these platform.

Salesforce has been good to me, for nearly a decade! Highly recommend.