I switched to a Mac a couple years ago but I'll always at least keep a Linux VM and a separate Linux laptop just in case.
As for why, generally speaking, Apple puts a lot of really, really good work into making a machine that feels immediately productive with little fiddling around, they're ahead of the pack in some ways, and for advanced stuff it's "good enough".
My reasons:
- Cross-device integration (at least with Apple) - I already use an iPhone, iPad, and AppleTV. The integration between iOS and macOS is just really, really good. Android+Linux just doesn't come anywhere close. And that's even if you put in the hours it'd take to set a bunch of disparate apps up to try to replicate it. Anyone telling you otherwise is completely full of bullshit or is showing that they actually haven't used Apple devices.
- Using my iPad as a secondary display takes literally 2 clicks.
- Setting my Apple Watch to unlock my laptop takes literally 4 clicks.
- Casting my screen or even just sound takes 2 clicks.
- Handoff is just magic. If you recently used something on your phone and have the matching app on your Mac, you get a shortcut in your Dock to load whatever you had on your phone on your computer to pick up where you left off. If I am in a Signal chat, I can instantly open the chat I was viewing on my phone. Same for browsing websites, text messages, and a bunch of things.
- Airdrop between devices "just works".
- If I connect to a wifi access point from my phone, my laptop will prompt me to automagically copy the password over (i think) bluetooth. Or if I'm at a friend's house and they use an iPhone, they'll get a prompt to share their wifi network password with me.
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Device restoration - Restoring a Mac is just impressive for how little effort it requires. If someone stole my laptop, I can drive 15 mins to an Apple Store, buy a new laptop, point it at my NAS, and be back running in an hour or less to exactly where I left off. Similarly, If I buy a brand new laptop, copying data from the old one to the new one is incredibly boring -- in all of the right ways. All apps/info/config/etc gets moved over. No weird quirks or workarounds or anything needed.
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M-series laptops - At the time, there were no other good options for ARM CPU laptops, especially ones that can be spec'd to 64GB of RAM. The M CPU laptops are crazy fast and efficient. I can literally use my laptop for 9-10 hours in a day going full-hardcore, and still have juice to spare. Yeah I know Asahi Linux works for the most part now, but I don't have time anymore to beta-test my main box.
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Adequate Unixy bits - The terminal does everything I need, the utilities are fine. I use Nix (and some Homebrew) to maintain various CLI tools.
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Software - I wanted to save this for last since everyone quotes this first. I wanted to meddle with music and Ardour doesn't really scratch the itch the same way Logic Pro does. Another example: as bad as the Mac version of Microsoft Office is, it's still far more nicer feeling than LibreOffice and requires much less work to get a good looking presentation/etc. out the door on a time crunch.