Unfortunately, the RAM and SSD of my current Air aren’t up to what I need. I realize I can upgrade the SSD, I’ve already encountered cases where 8 GB RAM just isn’t enough.
I'll be a post-senior in comp-sci this fall, I've been developing iOS apps for 6 years at this point and I've interned at a very large software corporation.
Trust me, your current laptop is fine for anything and everything you'll ever do in college. If you decide to use it for video editing or 3D-rendering for private projects, that is a different animal. Not related to school though.
The only use cases I've encountered in comp-sci so far where 8GB of RAM wasn't enough were Machine Learning and Docker related things. Both of which weren't even school related.
That being said, I did use a 15" MBP all the way through college (even upgraded to the 2016 model two years ago; was using a late-2013 15" prior to that) and I really enjoyed having the additional screen real estate. Lugging it around isn't as big of an issue as people who don't use or own one make it seem. I did buy an iPad Pro 10.5" the summer after freshman year though because I hate handling countless sheets of paper and the Apple Pencil meant taking digital notes only. All your friends are gonna love you, too because you can instantly share your notes with them and they'll have 'em right in their email inbox.
You'll be doing a lot of math and theoretical comp-sci, rather than writing apps in swift, etc. You pretty much don't even have to take the laptop to class. The iPad is fine in my experience.
=> you'll find the iPad to be much more useful compared with a new Mac
EDIT: typo
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seems to me you likely need the new 2019 MBP 15" baseline model?
[doublepost=1559749109][/doublepost]If I am buying a computer to will be used for a lot of spreadsheets, you tube, writing, browsing, storing lots of photos etc (15k plus) what would you all recommend?
A MacBook Air. Sounds like you don't need any sort of performance, at all. 15" can come in handy for large spreadsheets. My dad works with spreadsheets all day and he "downgraded" from 15" to 13" three years ago and after about a month of complaints he got used to it and would never go back. Just takes a little more scrolling around. Photo libraries differ wildly in size. Depends a lot on whether you shoot only iPhone pictures, or if you shoot a lot of high res (30+ mpix) pictures on a modern DSLR/MILC. I've got 51k photos and 2600 videos in photos.app shot on various cameras and phones starting with the Nikon D1 up to my EOS 5D mark IV today plus a bunch of iPhone pictures. The whole library is 735GB in total.