any former Vegas Pro users here?

You will not receive support from Sony, in the case of Vegas Pro, because Sony no longer owns that product line. You see, Sony had sold most of its Creative Software line, including Vegas, to the German company Magix, back in 2016. Thereafter, all support now comes from Magix, not Sony.

I suggest you browse thru the last few months posts here and read about all the people having serious problems with Premiere...  Not me, but I know what I'm doing.  (sorry that just slipped out).  Every piece of editing software has issues with new releases and hopefully they eventually get ironed out.  I was on an Avid Media Composer back in the day when they controlled hardware AND software and still when there were updates things often went seriously south.  Imagine what it's like when everyone's using different hardware, operating systems, and installations that include all sorts of software that can have conflicts with the editing app.  I'm not in love with Sony on a lot of levels (wait, I didn't realize sony didn't still owny it), but maybe you should just keep working in the previous release til the bugs are ironed out.  (and maybe premiere users should follow the same advice).  that said, I like the premiere interface and found it relatively simple to transition to it after finally abandoning fcp7.  My experience with Vegas pro is too limited to comment on how easy it will be to make the transition but if you decide to work with premiere, you've got a great resource here to answer your questions.