GoPro Cineform code...and a few related questions

I've been learning Resolve since I'd prefer to use it for several reasons...However, I still feel there are some things that are easier to do in Premier until Resolve gets them worked out, and so I've been trying to do most of the work in Resolve, export the video, then import that it into Premier Pro for the extras. I did a lot of searching and reading and, for my part, looking at all the formats and codecs that would yield the most across-the-board compatibility with the highest quality (but practical in size), it seemed to me that an AVI file with GoPro Cineform codec would be a good choice. But...

What I've found is that Premier Pro does not import AVI's with the GoPro Cineform codec. It does take MOV files that way, but for some reason, it can't handle the avi/cineform combo. Furthermore, Adobe is dropping support for the Quicktime 7 era formats, which I presume means eventually the MOV format may fall by the wayside. I saw the comments about DNxHD being a good codec, though I think that was also Quicktime (which is fine but then why has there been such a big deal about the GoPro Cineform codec now being supported everywhere?) It's all pretty confusing to me.

So, my question then is, would anyone like to offer advice on whether the AVI format -is- a great choice, or not. And, if it is then what other codec would be widely compatible across platforms? If not, is Quicktime/MOV still the way to go, until something really changes?
Along with that, what formats & codec(s) are most commonly used in the industry for deliverables (such that I'd be safe saving my original work that way knowing I can reduce the quality for online if need be, but still crank out a high-quality version if and when I need one)?

Thanks...

[Peter Chamberlain]

Are we to guess you have Windows 10?
DNx in MXF or MOV container is worth looking at.. not sure what PPro does.

Use MOV. AVI is outdated container and lacks support for metadata, like timecode etc.
Both Premiere and Resolve (as well as other tools) will work well for Cineform MOV files.

Other option is DNxHR which will also work well (also in MOV container).

They are both comparable (probably DNxHR has better overall support in other tools). With Cineform your advantage is that within Premiere and Resolve v15b7 you can decode it at fractional resolutions (by changing preview/proxy resolution), which means you can edit 4K files on "simple" 2 core laptop.

Many tools (including Adobe) have now their own MOV libraries (no need to rely on Apple outdated ones ), so MOV is not going anywhere any time soon. Companies abandoned use of QT engine on PC, which is outdated, not MOV as a container.

Adobe's QuickTime 7 issue does not affect Cineform. It's a good cross-platform DI.

I'm curious, though, what do you find lacking in Resolve that forces you to move to PP?

Adobe does not use QT engine on PC at all anymore.

On PCs just about everybody is leaving QT framework behind.
But that doesn't mean that one can't use MOV files any more. It was just comfortable to use Apple's routines instead of writing your own. But that's what manufacturers have to do now and most did already.