I haven't used Studio but I've been happy with EG, and I imagine moving to Studio would feel similar. There are going to be minor annoyances with any IDE change, but since Studio is the future, it's probably worth making the move.
The main point of confusion I see here for newbies moving from PC SAS to EG or Studio is the big picture realization that their code is not running on their local computer. Which means their SAS session can't see their C: drive, because it's running on some remote server (probably linux). So that takes time to learn, especially for people who don't have experience working on a remote server.
That said, I worked at a place where we had a linux server we had for batch jobs, but we could access it from Windows via Samba so I never really learned emacs/VI/etc. When I started my current job and was told we had a "BI Server" I was relieved to learn I could connect to the server via putty and batch submit jobs. Then I was excited to realize that I could run EG and save my code as .sas files on the linux server. So I still haven't had to learn a linux editor.
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