We have two Samsung Galaxy S-series phones and they are excellent. We've never had issues with the operating system nor reliability. Our kids all have iPhones and they are also excellent. We have Windows 10 laptops and I have no issues with those (full disclosure... I made my living on computers in my second career and they were all Windows with access to the mainframe or servers). I recently set up a new iPad for my 89 y.o. mother-in-law. It was easy and straightforward - a very nice device. I would say, considering today's technology in both camps, buy a product that suits your needs and budget but make sure it gets good reviews first.
Rob