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Gimp will save all layer information plus undo plus other stuff in its own format. Export does what you want. I don't know Adobe products, but I could imagine Photoshop doesn't save to jpeg as default.
Why are you using Linux and Android in the first place?
That's correct. The default Save action in Photoshop saves the entire project in their own proprietary format, rather than simply saving as an image file. GIMP and Krita work similarly.
Also, .zip is just as readily available and we easy to use in Linux as .tar is.
I don't really get where OP is coming from, tbh.
but zip is not the default and many a times you can't set a default in many applicatoins.
This is not just about gimp or file managers, many applications use formats which you can't use anywhere but on Linux most times.
Oh, by the way, you can open tar.gz on Android. No problem.
what abt the others tho? GIMP ok that's understandable, although I do hate the fact that GIMP is shipped by default with Linux distros rather than Kolour, which is much more easier to use. Not all of us need to do complex image editing and those who want to will install it.
MKV is the best video container. I don't know why many websites don't support it.
GIMP and Krita have their own file formats because they need to store a lot more information than you can put in a jpg or png. You need to export the image in a suitable format if you want to use it elsewhere.
You are not limited to using tar.gz archives. You can make zip or 7z archives just as easily.
Part of the Linux philosophy is open source (gnu et al) and open formsts.
If a file format is patented / proprietary / closed, then most open source tools are not going to generate that format by default.
Most do have options to export or convert, and when that option doesn’t exist, there are other tools that can do it.
One key thing to Linux (and MacOS) is understanding it doesn’t do everything for you so that you can tell it to do what you want, when you want.
Linux is free but it does take your time to get your workflow how you like it.
Mkv is just a container. It should be feasible to have things relatively wired so that when you make an mkv, with the click of a button (or automatically) convert to mp4 & tag & upload to YouTube.
It does require learning and mastery. Things have come a long way; Wi-Fi, for example, was ridiculous for a while.
Well to truthfully answer your question, ignoring your apparent frustration, Linux is not an operating system for the faint hearted. It is often highly technical and community driven. As a result, it can also be quite hard or just frustrating to use (for some users).
Saving a file in GIMP is basically saving the workspace. Elements that you create inside of GIMP get saved as individually. Exporting the file will let you get an actual image file (like a png or jpg or bitmap what have you), as is it that way with most pieces of software on most operating systems. Export almost always means "Gimme the end result". Like in 3d modeling software, where at export you can choose if it's an stl or whatnot and when saving, you save the actual workspace.
As for your screen recording tool, I don't know as I don't use it. But it is likely that it has a config as almost everything does in Linux and that the imaging format can be changed there permanently. If it does not have such a config I'd ditch it for something else tbh.
Many of these are defaults dating back to the Unix days, particularly tar (tape archive) and gzip.
Krita (KRA), GIMP (XCF), and Photoshop (PSD) save files in a lossless internal format that preserves layers etc. Every time you open and save a jpg, it gets worse, and that's not acceptable for professional use. If all you want is to crop/draw on images, something like KolourPaint is probably a better choice.
MP4 is/was patent encumbered depending on jurisdiction.
What distro are you using?
Mine compresses to .zip by default... has a built in image editor that saves to .jpeg... I use OBS for screen recording which saves to MP4
May just be a case of changing the apps you use, changing your settings in the apps to save into common formats by default, or just switching to a distro that is beginner friendly, maybe Zorin or Ubuntu
