Currently there is a limitation of uploading a file attachment size to max of 10 MB. SInce SPO can accept upto 250 MB per file in a list item, it makes sense to increase the attachment size in PowerApps to 250MB.
We are increasing the upload limit to 100MB and realeasing it as a preview feature in early October.
@gdavis53 it all depends on the problems you are trying to solve. We have been helping several clients implement PowerApps and they have been pretty happy with the solutions that were created. It's not appropriate for every problem, but it works great for many.
Its interesting how these all get connected to my original question about file size. Can you start separate threads on different topics please?
Thank you @FilipK that is good news looking forward to the release of this long-awaited file size increase