Not sure if that was addressed to me, or others, but I'll try to give a response.

If I bought a Nikon, Sony or whatever I would expect it to be a little different, but after a bit of learning I'm sure it would be manageable.

However, one of the reasons I have stayed with Canon is that they have been consistent for so long. The terminology Canon uses was built upon the design principles of the AE-1 introduced in 1976, and the P, Av, Tv terminology introduced with the A-1 in 1978 I believe. Much of what my current Canon DSLR has by way of controls was introduced with the T90 in 1986. Sure there are some new features and functions, but they're all extensions of the same framework. That makes it much easier to absorb new technology for many people.

Tech does indeed change, and these days faster than ever. With websites and smart phone apps and the agile development methodologies change is indeed a constant, and it feels like the apps or websites change how they behave every few weeks, which I personally find unnecessary and annoying, but some developer thinks they can improve things.

Compared with that, a nomenclature that has been consistent for close on forty years and a lens system (EOS / EF) for close to thirty years is impressive to me. Nikon and Pentax also seem to do pretty well in that regard, but few others.

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Thanks 'Bebu'...
I wish one (maybe Tony Northrup) of the EXPERTS who Review Cameras on You-Tube, would INCORPORATE into their 'UnBoxing' Videos, a Video-Section that Shows/Identifies the Button/Control/Menu-item or Any of the LETTERS identified by Mr. Burk (above), ...and THEN show the Actual-EFFECT-in-real-time in that Video. --- The way it's done NOW, the viewer merely learns that the Camera HAS something called 'xyz'; ...BUT, the poor guy or gal Never gets to KNOW 'What EFFECT that 'xyz' has on the REALISTIC-Acceptability of his IMAGE.
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Thanks for Listening to my Rant, Bebu ! ! !😃

Best advice I can give anyone here --- ever --- First, force yourself to read the camera manual while playing with your camera. Read every phreaking page of it! Next, find a subject in fixed lighting with lots of colors and details that DOES NOT MOVE. Then try every single control and menu setting on the camera, in isolation from all other settings! Include a note, IN each frame, indicating the setting being tested, and its exact value. Then put all these images into a reference folder. Carefully examine the effects.

I was lucky enough to be paid to do this for eight different camera bodies, so we could match their "looks" as closely as possible. It's a VERY worthwhile exercise and a huge learning opportunity.