Mac vs PC

I'm looking for help from people familiar with both systems. I'm a PC user but both my desktop and laptop are coming to the end of their cycle. I know that most graphic designers and media types use apple.

What would the advantage of switching over for a serious amateur like me that mainly works with photos but sees video in my future. I obviously use computers but am not on the computer sophisticated side.

I use standard windows picture to store and capture nx to pp the photos mainly for cropping, adjusting contrast, brightening shadows. I'm backing up to external HDs.
Thanks for any help.

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John