I am not so sure whether I am the right person to indicate a particular windows laptop for you as I´ve used only Macs for the past 15 years, but I can try to help you as I just decided to try out a Windows laptop and for that I had to do a lot of research. What is your budget exactly? If you do not require a powerful discrete graphics card, I think any ThinkPad, XPS or Yoga would do wonders for you for a very good bang for the buck. If you need a lot of horsepower in a thin and lightweigh laptop, I would highly recommend the MSI GS65 (seriously I am loving this machine

), Razer Blade 15 and Gigabite Aero15X. Those devices can be very snappy and they have excellent build quality. Besides, they are totally upgradable and serviceable if you are tech savvy. By the way, I am using Ubuntu in dual boot on my MSI GS65 and the experience has been great so far! I use Windows exclusively for graphic intensive tasks like gaming, 3d modelling and video editing, whereas I use Ubuntu for writing documents (libre office and LaTex), regular browsing and mail.
Thanks for the detailed reply Leo90! I am a graduate student and busy writing. That is the main reason I had (sadly) left behind Ubuntu (with Windows) years ago. I wanted a reliable, hassle free, light laptop that would last me at least 4 years. My first MBP was that, and much more. But those are really my only requirements - writing on MS Word, youtube, lots of internet browsing, all day battery backup is crucial, and occasional photo editing (since I am an amateur photographer). I am willing to go up to $1000-1100, though I've spent more on Macs.
But here's where things get tricky -
-Earlier Windows would start to slow down within 6-8 months of heavy use, and need a fresh install soon after.
-The threat of viruses was always around.
-The batteries were no match for Apple, though XPS and the like are now, and worst of all the backup would start to go down significantly within 1-2 years of heavy use.
-The weight was heavy, though again this is not an issue now.
-There is also the issue of resale. My 3.5 year old base MBP is currently going for $450-550. I am guessing a similar specced XPS will not get more than $150.
So, at this point I am thinking that I could just get the old Air with the extended warranty and use it to tide over these changes at Apple for the next 3.5 years. At that point I can take a call and actually shift to a Windows/Ubuntu combination.
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So if the MacBook is no longer that reliable, why get another one? The air is a lot weaker than your current MacBook Pro and all you are getting is battery. Is there anything you need on Mac that you can't get on Windows? The Air will have keyboard problems because even the third gen 2018 macbooks have it.
You can get the base Surface Book 2 for 1300 in most places and it will give you signifiantly better perfomance, better keyboard, higher resolution screen, a touch screen with pen option, and great battery life as well. Plus you will have both USB C and USB A so no need for dongles.
Because things have still not deteriorated to a point where the decision becomes self-evident. The OS is still robust (for my purposes at least), the battery is among the best, and the weight/display are great too. The problem is with the pricing and the realisation that Apple is only interested in students who can pay $1150. I can even pay that, or more.
My MBP was $1450 with the 3 year warranty. But then the machine should last me not less than 5 years, with only the battery needing replacing.
What has come as a complete surprise to me and my friends is the realisation that practically speaking (reliability issues, cost of regular replacements) you will want to get a new Mac every 3.5 years or so. I can put in $400 in my machine now, but what happens if there is a component failure 6 months down the line? That reliability that let you confidently use the machine for years on end is all but gone now.
They want you to get a new machine every few years, and pay more and more for that. The competition meanwhile has caught up, and how!