Why don't Apple just add any chip to iPhone, MacBook, iPad what would make non original or non Apple spare parts useless?

for example if you buy non apple iphone screen replacement, iphone would not just detect new screen cuse it has that chip on logicboard.

also chip may built into cpy die itself, so it can't be removed by just soldering it just from board

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Do I need another computer if I get an iPad?

I currently have a Microsoft Surface 3 (non-pro). It's alright, but does have a few bugs from time to time. So I often wonder if going iPad instead would be better due to their reputation for fewer bugs once my Surface finally gives out.

I do understand I would have to give up using my external CD/DVD/Blu-ray drive and USB connected printer. But I don't use disc programs and media as much as I used to, and the printer is old so may need to be replaced some day too.

Still, I don't want to buy both a tablet and a computer. I like how the Surface has served me as a "tablet that can replace a laptop". I guess my question is if an iPad would be able to replace a laptop as well.

I mainly do research, and all my info I research is now on-line, hence I no longer need, necessarily, the disc programs I've been using.

I also use Microsoft Office and OneDrive a lot. I understand that those will work on an iPad, but are they just as good on an iPad? I also compose a lot of other documents in other languages and am used to the keyboard shortcuts that type in foreign characters on the document. How good is iPad in that area? And if I have problems with my iPad, would I be expected to connect it to a computer to fix it?

Would I be best getting an iPad or sticking with the Windows based operating system on a tablet?

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