Copy and paste has been revolutionary for productivity. That may sound silly, especially considering how commonplace it is. Everyone uses that function, all the time. But without it, we’d have to start from scratch on whatever we are working on.
Remotely accessing a Mac is designed to be easy. You can use several third-party tools and apps, and Apple has spent time to ensure anyone can access their Mac - desktop and laptop devices - from any other Mac device, anywhere.